The team is low on morale and confidence (there is nothing worse than losing games from winning positions - the players know that they lost the games themselves rather than Sri Lanka winning it) and if recent reports of infighting and player politics are true, another spectacular collapse and defeat cannot be ruled out. Add to that the fact that Srilanka won both games despite not having played at their best themselves. Their batting has not really fired in this series; the bowlers won them both games. Expect another 3 or 4 day finish.
We still have to lift ourselves - Jayawardene
http://www.cricinfo.com/slvpak2009/content/story/414842.html
" Winning the second Test was a fantastic achievement and a great effort from all the guys in the team," he wrote on his website.So to play below par and take a 2-0 lead is really pleasing. [But] the fact is that we are not playing brilliant Test cricket right now and there is some way for us to get to our best. As Sanga [Sangakkara] said afterwards, it reflects well on the teamwork and the fact that when we needed something special someone put their hand up."