Joburg Super Kings coach Stephen Fleming said his team is being hamstrung by an inability to deal with pressure in the SA20.The Super Kings slipped to a third disappointing loss on Wednesday when they were crushed by six wickets by Highveld rivals, the Pretoria Capitals on Wednesday evening.It’s the manner of the defeat that's concerning for the Super Kings as they were rolled for 122 in 15.4 overs, while in the other defeats against the Paarl Royals and the Mumbai Indians Cape Town, they made 82 and 105 batting first.READ | Joburg Super Kings spinner Aaron Phangiso reported for suspect bowling actionWhat stood out about the Super Kings' defeat at SuperSport Park was the fast start that was frittered away.They were 70/2 at the end of the six-over powerplay, with captain Faf du Plessis powering to a 22-ball 51.There was nothing on either side of that innings as a customary batting meltdown ensured the Super Kings were on the receiving end of a heavy defeat.Fleming said the fact that they've been bowled out three times in five games represents a significant problem."You've got a team that's batted first every time, and in the early stages of a tournament, that can be a little bit tricky," Fleming said."We got undone at the coast a couple of times, so there's a confidence issue, a technical one, and a mental one."It’s the balance of still being aggressive and positive, weighing up the match situation and that's not been ok."We've had some good pockets, but we've been bowled out three times in five games, which represents a poor showing.WATCH | Neesham takes Superman special as SA20 produces another stunning catch"We're five games in and we've won two in a pretty close competition, so it can't be all doom and gloom."We're