Tottenham manager Mauricio Pochettino admits he is worried by Erik Lamela's ongoing hip problem.
The Argentine winger has not appeared since the EFL Cup match against Liverpool on October 25 and seems no closer to a comeback.
He was initially only expected to miss a few weeks but Pochettino says he is still no closer to identifying a return date almost six weeks on from his last appearance.
He said: "We are a little bit worried about his situation because the evolution [of his injury] is just not how we expect.
"We need to give more time for his recovery.