Pakistan T20 captain Shahid Afridi says he will quit international cricket if he starts feeling he is a burden to the team. "The fact is that the senior players are letting down the team. We can't expect to win much with our current poor form. I want to lead from the front, and if I feel that I'm going to be a burden, then I will quit the format well before next year's ICC Twenty20 Cricket World Cup in India," Afridi said.