The 25-year-old, who plays for Fulham, hardly featured for the Premier League club during his debut season. Like compatriot Benni McCarthy, another player that has spent a large part of 2009/10 on the sidelines, there have been concerns the pair are not up to full fitness heading into next month's global showpiece.
But Dikgacoi said: "That (weight) has been my concern but I worked hard at Fulham. After the training sessions I would go with the physical trainer and the team for some more work, because I wanted to be in the team that will play in the World Cup and I had to do more work to make sure I'm sharp.
"It is very good to be back. I have played with these guys for some time now and although I could not join them in their recent camps in Brazil and Germany, I feel I can comfortably slip back into the team. I think the qualities that got me selected in the first place are still of use to the coach."
The former Golden Arrows star made just seven starts for the Craven Cottage club in the league, while he was also bit-part player during the team's UEFA Europa League run that took them all the way to the final. Reflecting on his first season in England, he added: "I must say it wasn't the best season for me. I was expecting to play as many games as possible, but I can put in many excuses.
"My first game I got a red card and in the second game I got an injury, that took me out for about six weeks. But the positive is that the manager Roy (Hodgson) was excited about me. So hopefully next season it will be the best."