"Robbie is improving," said the Liverpool boss. "He's been working on his physical condition and the training sessions have been really good for him.
"He is much better now. We've been focusing specifically on his stamina levels. Pako Ayesteran knows exactly how much Robbie must run and when.
"These stamina training sessions have been the most important for him. I can see a change in Robbie already. A lot of people have been saying he looks thinner.
"Also, we're seeing a bit more pace from him. He's never been a sprinter, but his intelligence means he gets to balls early.
"When we decided to sign him, I was thinking it might be the last month of the season before he's completely match fit.
"We are hoping for a lot of goals from him. Maybe they will start now or maybe they will come a bit later. The most important thing is we have a player with passion and quality."