The 28-year-old said good showings in the rained-off first warm-up game against New Zealand -- where they reduced the co-hosts to 157 for seven -- and then a shock seven-wicket win over Sri Lanka had bolstered Zimbabwe's morale.
"It (the warm-up performances) gives us a lot of confidence," said Chigumbura on Saturday. "It gives us a lot of the belief that we do need as a team, that it's possible to beat a big team, and obvious, looking at the guys who performed, our main batters, which is a good sign."
"We're looking forward to the main games now, and hopefully the guys who performed well will carry on with their form and hopefully finish on the better side tomorrow," Chigumbura added.
Zimbabwe were crushed 5-0 in Bangladesh in November last year, a defeat which led them to hire World Cup-winning coach Dav Whatmore.
Chigumbura, who is in his second stint as one-day captain, revealed that Whatmore had wrought a significant change in the team's outlook.
"Guys are more comfortable dealing with him. He's bringing lots of experience and different tactics and looking at the games that we played, the two games that we played, you can tell that we're heading in the right direction."
However, the Zimbabwe captain said facing South Africa would be a tough opening contest for his side.
One of Zimbabwe's only two wins against neighbours South Africa in 37 one-day internationals to date came during the 1999 World Cup in England, courtesy a brilliant all-round performance by Neil Johnson.
