Atletico Madrid's Arda Turan (L) and Levante's Kalu Uche fight for the ball during their Spanish first division soccer match at the Ciudad de Valencia stadium in Valencia, Spain, May 10, 2015. REUTERS/Heino Kalis 

Atletico Madrid's Jose Maria Gimenez (L) and Levante's Kalu Uche fight for the ball during their Spanish first division soccer match at the Ciudad de Valencia stadium in Valencia, Spain, May 10, 2015. REUTERS/Heino Kalis 

Atletico Madrid's Jose Maria Gimenez (front) and Levante's Kalu Uche fall as they fight for the ball during their Spanish first division soccer match at the Ciudad de Valencia stadium in Valencia, Spain, May 10, 2015. REUTERS/Heino Kalis TPX IMAGES OF THE DAY

Kalu Uche (L) of Qatar's Al-Rayyan fights for the ball with Hanif Omran Zadeh of Iran's Esteghlal during their AFC Championship League soccer match in Doha, March 11, 2014.REUTERS/Fadi Al-Assaad (QATAR - Tags: SPORT SOCCER) 

Kalu Uche (front) of Qatar's Al-Rayyan fights for the ball with Hanif Omran Zadeh of Iran's Esteghlal during their AFC Championship League soccer match in Doha, March 11, 2014.REUTERS/Fadi Al-Assaad (QATAR) 

Kalu Uche of Qatar's Al-Rayyan celebrates after scoring a goal against Iran's Esteghlal during their AFC Championship League soccer match in Doha March 11, 2014. REUTERS/Fadi Al-Assaad (QATAR - Tags: SPORT SOCCER) 

Kalu Uche of Qatar's Al-Rayyan celebrates after scoring a goal against Iran's Esteghlal during their AFC Championship League soccer match in Doha March 11, 2014. REUTERS/Fadi Al-Assaad (QATAR - Tags: SPORT SOCCER) 

Espanyol's Kalu Uche (R) fights for the ball against Valencia's Ricardo Costa during their Spanish First division soccer league match at Cornella-El Prat stadium, near Barcelona, April 15, 2012. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER) 

Espanyol's Kalu Uche (R) fights for the ball with Valencia's Ricardo Costa during their Spanish First division soccer league match at Cornella-El Prat stadium, near Barcelona April 15, 2012. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER) 

Kalu Uche (L) of Neuchatel Xamax fights for the ball with Saif Salman of The Iraq Olympic Team during their Matchworld Cup in Dubai January 18, 2012. REUTERS/Rabih El Moghrabi (UNITED ARAB EMIRATES - Tags: SPORT SOCCER) 

Neuchatel Xamax's Kalu Uche (L) fights for the ball with FC Basel's (FCB) Joo Ho Park during their Swiss Super League soccer match in Neuchatel, December 11, 2011. REUTERS/Michael Buholzer (SWITZERLAND - Tags: SPORT SOCCER) 

Neuchatel Xamax's Kalu Uche (L) scores a goal to FC Lausanne-Sport's goalkeeper Anthony Favre during their Super League soccer match in Lausanne December 3, 2011. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT SOCCER) 

Neuchatel Xamax's Kalu Uche (L) fights for the ball with FC Lausanne-Sport's Frederic Page during their Super League soccer match in Lausanne December 3, 2011. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT SOCCER) 

Neuchatel Xamax' Uche Kalu (L) scores the first goal against FC Zurich's (FCZ) goalkeeper Johnny Leoni during their Swiss Super League soccer match in Neuchatel November 6, 2011. REUTERS/Pascal Lauener (SWITZERLAND - Tags: SPORT SOCCER) 

Neuchatel Xamax's Kalu Uche (R) fights for the ball with FC Servette's Francois Moubandje during their Super League soccer match in Geneva October 30, 2011. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT SOCCER) 

Neuchatel Xamax's Kalu Uche (C) celebrates his goal with team mate Sebastien Wuethrich and Geoffrey Treand (L) during their Super League soccer match against FC Servette in Geneva October 30, 2011. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT SOCCER) 

Neuchatel Xamax's Kalu Uche (L) celebrates his goal with team mate Sebastien Wuethrich during their Super League soccer match against FC Servette in Geneva October 30, 2011. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT SOCCER) 

FC Neuchatel Xamax's Kalu Uche (R) fights for the ball with FC Luzern's Adrian Winter during their Swiss Super League soccer match in Luzern, October 22, 2011. REUTERS/Christian Hartmann (SWITZERLAND - Tags: SPORT SOCCER) 

FC Neuchatel Xamax's Kalu Uche (R) fights for the ball with FC Luzern's Adrian Winter during their Swiss Super League soccer match in Luzern, October 22, 2011. REUTERS/Christian Hartmann (SWITZERLAND - Tags: SPORT SOCCER) 

FC Neuchatel Xamax's Kalu Uche (C) celebrates with team mates after scoring his team's first goal against FC Luzern during their Swiss Super League soccer match in Luzern, October 22, 2011. REUTERS/Christian Hartmann (SWITZERLAND - Tags: SPORT SOCCER) 

FC Neuchatel Xamax's Kalu Uche (L) celebrates after scoring his team's first goal against FC Luzern during their Swiss Super League soccer match in Luzern, October 22, 2011. REUTERS/Christian Hartmann (SWITZERLAND - Tags: SPORT SOCCER) 

FC Neuchatel Xamax's Kalu Uche (C) celebrates with team mates after scoring his team's first goal against FC Luzern during their Swiss Super League soccer match in Luzern, October 22, 2011. REUTERS/Christian Hartmann (SWITZERLAND - Tags: SPORT SOCCER) 

FC Thun's Stipe Matic (L) fights for the ball with FC Neuchatel Xamax's Uche Kalu during their Swiss Super League soccer match in Neuchatel October 1, 2011. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: SPORT SOCCER) 

Grasshopper's (GC) Remo Freuler (R) fights for the ball with Neuchatel Xamax's Kalu Uche during their Swiss Super League soccer match in Zurich, September 25, 2011. REUTERS/Christian Hartmann (SWITZERLAND - Tags: SPORT SOCCER) 

Neuchatel Xamax' Uche Kalu (L) fights for the ball with Grasshopper's (GC) Lacopo La Rocca during their Swiss Super League soccer match in Neuchatel Septemeber 11, 2011. REUTERS/Pascal Lauener (SWITZERLAND - Tags: SPORT SOCCER) 

Almeria's Kalu Uche (L) fights for the ball with Barcelona's Thiago during their Spanish King's Cup semi-final soccer match at Juegos Mediterraneos stadium in Almeria, February 2, 2011. REUTERS/Francisco Bonilla (SPAIN - Tags: SPORT SOCCER) 

Nigeria's Kalu Uche (C) reacts after the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Mike Hutchings (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

South Korea's goalkeeper Jung Sung-ryong eyes the shot by Nigeria's Kalu Uche as it hits the post during a 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Lee Jae-Won (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (L) fights for the ball against South Korea's Lee Young-pyo during the 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Yves Herman (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (R) celebrates after scoring the first goal during the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Rogan Ward (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (L) is joined by Dickson Etuhu as Uche as he runs towards the Nigerian bench to celebrate his goal against South Korea during a 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Lee Jae-Won (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (R) celebrates after scoring the first goal past South Korea's Cha Du-ri during their 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Lee Jae-Won (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (R) celebrates after scoring the first goal as South Korea's Lee Young-pyo reacts during their 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Paul Hanna (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (R) scores past South Korea's Cha Du-ri during the 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Lee Jae-Won (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Dickson Etuhu runs past the South Korean bench as he celebrates a goal by teammate Kalu Uche (unseen) during a 2010 World Cup Group B soccer

match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Rogan Ward (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (R) celebrates his goal with team mate Dickson Etuhu during the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Yves Herman (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP IMAGE OF THE DAY TOP PICTURE) 

Nigeria's Kalu Uche (R) celebrates his goal with team mate Dickson Etuhu during the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Yves Herman (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (R) shoots to score the first goal past South Korea's goalkeeper Jung Sung-ryong during their 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Rogan Ward (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP IMAGE OF THE DAY TOP PICTURE) 

Nigeria's Kalu Uche (R) celebrates his goal with team mate Dickson Etuhu during the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Yves Herman (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (L) celebrates after scoring the first goal past South Korea's goalkeeper Jung Sung-ryong during their 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Lee Jae-Won (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP IMAGE OF THE DAY TOP PICTURE) 

Nigeria's Kalu Uche (R) celebrates his goal with team mate Dickson Etuhu during the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Yves Herman (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (L) shoots to score the first goal past South Korea's goalkeeper Jung Sung-ryong during their 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Lee Jae-Won (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP IMAGE OF THE DAY TOP PICTURE) 

Nigeria's Kalu Uche (L) celebrates his goal with team mate Chinedu Obasi during the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Yves Herman (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (C) shoots to score the first goal past South Korea's goalkeeper Jung Sung-ryong (R) during a 2010 World Cup Group B soccer match at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Lee Jae-Won (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche celebrates his goal with team mate Nwankwo Kanu (L) during the 2010 World Cup Group B soccer match against South Korea at Moses Mabhida stadium in Durban June 22, 2010. REUTERS/Yves Herman (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche reacts after the 2010 World Cup Group B soccer match against Greece at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Kim Kyung-Hoon (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Greece's Giorgos Karagounis (L) fights for the ball against Nigeria's Kalu Uche during a 2010 World Cup Group B soccer match at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Kim Kyung-Hoon (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche (R) reacts as Dimitris Salpigidis celebrates after scoring Greece's first ever World Cup goal, during their 2010 Group B soccer match at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Christian Charisius (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Dimitris Salpigidis (C) celebrates after scoring Greece's first ever World Cup goal, during their 2010 Group B soccer match against Nigeria at Free State stadium in Bloemfontein June 17, 2010. Near him are team mates Kostas Katsouranis (L), Loukas Vyntra (2nd L) and Nigeria's Kalu Uche (R). REUTERS/Christian Charisius (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Greece's Alexandros Tziolis (L) fights for the ball against Nigeria's Kalu Uche during the 2010 World Cup Group B soccer match at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Christian Charisius (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche celebrates after scoring a goal during a 2010 World Cup Group B soccer match against Greece at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Kim Kyung-Hoon (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche celebrates after scoring a goal during a 2010 World Cup Group B soccer match against Greece at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Kim Kyung-Hoon (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's players celebrate after team mate Kalu Uche scored during a 2010 World Cup Group B soccer match against Greece at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Kim Kyung-Hoon (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche celebrates with his teammates after scoring a goal during a 2010 World Cup Group B soccer match against Greece at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Jorge Silva (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's Kalu Uche reacts after scoring a goal during a 2010 World Cup Group B soccer match against Greece at Free State stadium in Bloemfontein June 17, 2010. REUTERS/Kim Kyung-Hoon (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

The Nigeria team poses during a 2010 World Cup Group B soccer match against Greece at Free State stadium in Bloemfontein June 17, 2010. Clockwise (L-R) Danny Shittu, Dickson Etuhu, Yakubu Aiyegbeni, Chidi Odiah, Joseph Yobo, Haruna Lukman, Kalu Uche, goalkeeper Vincent Enyeama, Taye Taiwo, Sani Kaita and Peter Odemwinge. REUTERS/Jorge Silva (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Argentina's Gabriel Heinze (front) fights for the ball with Nigeria's Kalu Uche during the 2010 World Cup Group B soccer match at Ellis Park stadium in Johannesburg June 12, 2010. REUTERS/Eddie Keogh (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Argentina's Gabriel Heinze (C) fights for the ball with Nigeria's Kalu Uche (R) during the 2010 World Cup Group B soccer match at Ellis Park stadium in Johannesburg June 12, 2010. REUTERS/Eddie Keogh (SOUTH AFRICA - Tags: SPORT SOCCER WORLD CUP) 

Nigeria's national soccer team player Kalu Uche reacts during a friendly soccer match in Wattens May 25, 2010. REUTERS/Dominic Ebenbichler (AUSTRIA - Tags: SPORT SOCCER WORLD CUP) 

Real Madrid's Raul Albiol (R) is challenged for the ball by Almeria's Kalu Uche during their Spanish first division soccer match at the Mediterraneo stadium in Almeria, April 15, 2010. REUTERS/Marcelo Del Pozo (SPAIN - Tags: SPORT SOCCER)