 Complete the following phrase:  Cahill started Chelseas UEFA Champions League semi-final first leg against Barcelona because of the injury picked up by David Luiz in the FA Cup semi-final. The match finished 10, with Cahill making some crucial tackles in the second half. In the sixth minute of the second leg, Cahill stretched to win the ball and went down with a hamstring injury. Although he tried to run it off, he eventually had to be replaced by José Bosingwa in the 13th minute. Chelsea went on to win 32 on aggregate and set up a meeting with Bayern Munich at the Allianz Arena in the 2012 UEFA Champions League Final. Chelsea went on to win the seasons FA Cup, beating Liverpool 21 at Wembley Stadium in the 