I think several players are not 100% fit, and that doesn't help. Boruc doesn't look right, Clyne and JRod have knocks, Lovren and Ramirez were doubtful today, Morgan, VW, Guly Davis out injured, RL struggling - not sure if he can't hack 90 mins any more or is carrying a niggle.
Putting all that together with our high tempo game and it's a problem. We need more options for rotation to keep it up all season.