Cape Town - Kaizer Chiefs striker Leonardo Castro believes the club must collect the three points in this Saturday's Soweto derby against fierce rivals Orlando Pirates at FNB Stadium.
The Colombian striker has so far played in three games against the Buccaneers.
His first derby came just two months after joining Amakhosi and scored the equaliser, before Pirates went on to edge Chiefs 3-1.
Castro also netted in their most recent meeting, a Telkom Knockout semi-final in November, but it wasn’t enough to go through to the final as Chiefs suffered a 2-1 defeat.
"The Soweto Derby is South Africa's biggest game; no other game even comes close. I don't feel any nerves," Castro said as quoted by the club's official website.
"I barely sleep after having lost a game. I keep thinking, 'What should have been done differently?' But you also need to move on, you can't get stuck in a disappointing moment.
"It's a must-win Derby, also because we want to get closer to the top of the log. We have improved a lot since [Ernst Middendorp] joined. We are training hard and are very motivated to do well [this weekend]."
Chiefs are currently 10 points behind Absa Premiership leaders Bidvest Wits after 18 matches played, and head into this weekend's clash needing a victory to revive any hopes of a title challenge.
Meanwhile, the Sea Robbers are five points behind the Clever Boys though they do have one game in hand over Gavin Hunt's side.
Should Pirates lose to Chiefs, it could come as a critical blow to their own title challenge.
Kick-off is at 15:30.