Veteran lock Victor Matfield believes he still has something to add to the Springbok match-day 23 on Saturday.
The 38-year-old has been nursing a hamstring strain but is now fit to play. Coach Heyneke Meyer named Matfield on the bench in the place of the promising Peter-Steph du Toit.
"After a frustrating few weeks with my hamstring I'm really excited to be involved again," said the Springbok stalwart.
"The team have been performing really well and I feel I can add something. I came back to be at the World Cup. I believe this is a team that can win the World Cup and I want to be part of it."
South Africa faces the indomitable New Zealand in their semi-final clash on Saturday at Twickenham. Matfield added that the final ten minutes will be crucial.
"If you look at all the big games, especially between South Africa and New Zealand, it's going down to the wire every time," he said.
"Every time it's within five or six points with two or three minutes to go. That last ten minutes is very important. It's all about composure, doing the right things and keeping your calm. The last ten or 15 minutes will be crucial on Saturday. I'm 100 percent sure of that."
Meanwhile, Meyer, who believes he has picked his strongest bench ever, heaped praise on his loyal servant.
"From day one, wherever we need him, he has been ready to serve," said Meyer.
"If that's playing, coming on as an impact [replacement], grooming the youngsters or just being part of the team and keeping the bags, he's happy to help.
"He's been an unbelievable servant of Springbok rugby and we're proud to have a guy like that, especially on the bench as it makes a great difference to us to have a leader and a great player there at the end."