at Lincoln Financial Field, Philadelphia|weather= 47&#160;&#176;F (Cloudy)A matchup that pitted the Eagles' No. 1 offense against the league's worst defense turned into a disaster for the Eagles, as they lost to the heavy underdog Titans . The Tennessee Titans scored on the opening drive with a 14-yard reception by tight end Ben Troupe. An apparent Brian Westbrook touchdown reception was reversed by a coach's challenge and Donovan McNabb tossed an interception the next play. The Eagles got on the board at the end of the quarter with a 42-yard field goal by David Akers, making it 7-3.  Early in the second quarter, McNabb was pushed out of bounds at the end of a scramble, and had to be carted off of the field with a knee injury. Backup quarterback Jeff Garcia came into the game and helped drive the Eagles to another field goal, closing the gap to 7-6. Vince Young led the Titans to a scoring drive of their own before the end of the half, making it 10-6.  In the third quarter, the Eagles saw their season slip away from them.  Travis Henry broke a 70-yard touchdown run, then Pacman Jones returned a Dirk Johnson punt 90 yards. The Titans led 24-6 and Garcia, who had 48 pass attempts in less than three quarters, could only register a short touchdown pass to L.J. Smith. A botched shotgun snap led to a humiliating, late defensive touchdown for Tennessee.  Westbrook rushed for 102 yards in the 31-13 loss.  McNabb's knee injury was revealed after the game to be a torn ACL, knocking him out for the season. At the time, it was thought that the loss of the game and McNabb would virtually crush Philadelphia's playoff hopes.
Question: How many touchdowns did the Titans score?
Answer: 4