The New York City FC midfielder is contracted to the Premier League champions until January, but has refused to rule out a longer stay.
"That will obviously be a club decision first and foremost. I wouldn't want to get too ahead of myself. It's not my place to do that," he told reporters.
"I'll just train as hard as I can and play as well as I can - that's the important thing - then we'll see what happens. I'm signed here until January so that's all I can say at the minute."
New York City FC's Major League Soccer campaign is due to commence in March.