The goal was really made by Aaron Lennon, and his run was so good that even he couldn't screw up the cross. AC Milan really did not look a threat. Zlatan Ibrahimovic created a few chances late, but for most of the match you would have thought Tottenham were the home team.
In my humble opinion, AC Milan are a spent force, and their current position perched atop Serie A only speaks further to the steep decline in the quality of that league. It's hard to see anything but a fairly easy home win for Spurs in the second leg of this tie.
As for Tuesday's other match, Schalke have an away goal and Valencia are not known for traveling well, especially to Germany. It's hard to see anything other than the German side advancing to the last 8.