Frank Lampard has lasted just 20 minutes of Manchester City's ongoing friendly encounter against Hamburg in Abu Dhabi.
The veteran midfielder appeared to be struggling with a hip complaint, which resulted in him being replaced by Scott Sinclair.
Although there is no official news as yet regarding the severity of the problem, it may rule the 36-year-old out of a return to his former club Chelsea when they play host to City at Stamford Bridge on January 31.
The ex-England international has scored seven goals from his 21 appearances for the champions so far this season.
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