Manchester City coach Pep Guardiola, after his team eliminated Bayern Munich from the UEFA Champions League yesterday, indicated that his players feel exhausted before the FA Cup semi-final match against Sheffield United at Wembley this Saturday. He said, "It's extremely difficult, so I don't know how we will approach the match," noting that defender Nathan Aké will undergo tests later today to assess a suspected injury to his hamstring after leaving the field in the second half against Bayern Munich. City drew 1-1 with Bayern in Munich in the return leg of the quarter-finals, winning 4-1 on aggregate, and qualified for the final of the continent's top tournament for the third consecutive season. The Premier League champions will meet Real Madrid before the semi-final. Guardiola's team is also looking to retain the Premier League title, trailing four points behind leaders Arsenal, with a game in hand.