Fiji born All Blacks winger Sitiveni Sivivatu has signed a contract extension with Waikato.

Sivivatu's teammates Richard Kahui, Stephen Donald and Liam Messam and key Super 14 players Toby Lynn and Romana Graham also put pen to paper until the end of 2011.

All of these players are now committed until the end of 2011.

Waikato Rugby chief executive, Graham Bowen says it is a bonus for the team to have these players again and will lift the standard of rugby played in Waikato.