The United States international has returned for a second two-month spell, having done the same in the early part of 2010.
He played 13 matches and scored twice but the American, who turns 30 in March, is confident he comes back a better player, and said: "I am really excited to get back here and play. Since being here first time I've played in a World Cup and had another couple of years' experience so I feel more prepared this time."
Donovan added: "I know exactly what I am getting into and exactly what is expected of me and hopefully I can fit in.
"Sometimes I think life is about expectations. Last time there was zero expectations so I can only make up from that.
"I understand there is some level of pressure and expectation but all footballers deal with that.
"I don't worry about that, I want to enjoy my two months here and the way I play I think I can help the team."
Source: PA
Source: PA