After a walkover 104-7 win against Uruguay in their opening match, the Junior Boks are expecting a much sterner test against hosts Georgia in their second at the Junior World Championship on Thursday, Rambo Kubheka said.Kubheka, who led the South Africa U20s against Uruguay, said the Boks had remained firmly grounded and were aware that tougher challenges lay ahead.For the Georgia showdown, Kubheka will start off the bench, and Siphosethu Mnebelele will take over as captain in a rotational move.Despite the margin of victory in the opener, Kubheka said it was important to retain perspective ahead of the Georgia clash at the Avchala Stadium in Tbilisi (kickoff 6.30pm).“The boys played well, and I couldn’t have asked for more in our first game,” he said.Kubheka, who led from the front with a strong performance in the tight exchanges, was replaced in the second half by squad captain Mnebelele.“We’ve played Georgia three times already this year, so we know what’s coming,” Kubheka said. “They are a hard-working, physical side, and we are very clear about the challenge they will bring.”Junior Boks coach Kevin Foote has made significant changes for Thursday's match, retaining just four players from the opening victory over Uruguay. Picture: