In the previous match in this Champions League tie, Tottenham defeated AC Milan away from home by using their speed to dominate the wings and some midfield steel to nullify their hosts' passing display. Most of all, though, they used Aaron Lennon to stretch the right and Peter Crouch to win the ball in the air, and that's just not happening at all today.
Lennon simply isn't receving possession in dangerous areas. He's being forced to defend thanks to Vedran Corluka's inability to really deal with any of Milan's attacking trident, and so whenever he picks up the ball he's very, very deep and unable to surge forwards. Meanwhile, Crouch, who had been dangerous in the air in the early stages, hasn't won a ball without fouling his defender in the process in at least fifteen minutes. Plan A isn't just isn't working for Spurs so far. Massimiliano Allegri, on the other hand, will be delighted - it seems like just a matter of time until his side are level with Tottenham on aggregate.