Umaga of New Zealand's Waikato Chiefs is tackled by Alberts of South Africa's Sharks during their Super...
Tana Umaga of New Zealand's Waikato Chiefs is tackled by Willem Alberts of South Africa's Sharks (R) during their Super 15 rugby match at Waikato Stadium in Hamilton March 18, 2011. REUTERS/Nigel Marple (NEW ZEALAND - Tags: SPORT RUGBY)