England midfielder Frank Lampard admits he feared for Rio Ferdinand after seeing the tackle which ended the Manchester United defender's World Cup dreams. Ferdinand was injured in a collision with Emile Heskey in England's first training session in Rustenburg on Friday and the England skipper was ruled out for up to six weeks following a scan. "He's very down," Lampard said of Ferdinand. "It's a huge competition, the biggest competition. It made me feel a bit sick in the stomach so I can't imagine how he feels. "I was fearful for him because you could see the pain of the fall but also there was an element of fear. "We all understand that. We've all had moments during our club careers as well where there's big games coming up and you feel you might have done something to put you out of that game. "I understood straight away that it was potentially a bad one and then it was fingers crossed for the scan and obviously it turned out to be bad."