Tottenham boss Villas-Boas facing injury headache for Arsenal clash Tottenham boss Andre Villas-Boas is facing a mounting injury crisis ahead of Saturday's north London derby against Arsenal. Kyle Walker, Jermain Defoe and Aaron Lennon are all struggling to be fit for the Premier League showdown at the Emirates. Injury headache: Spurs boss Andre Villas-Boas And Mousa Dembele is unlikely to be risked as he battles with a long-standing hip problem. Walker, Defoe and Lennon are all to assessed on Thursday after they suffered hamstring injuries during the 2-1 defeat at Manchester City last weekend, which prevented them from taking part in England's friendly in Sweden. Walker and Lennon withdrew from the original squad and Defoe was unable to link up with Roy Hodgson's group as cover for Wayne Rooney Walker looked in some discomfort when he limped off towards the end of the match at Etihad Stadium, while Lennon was also replaced late on. Defoe played little part in the game after coming on as an 80th-minute substitute for Emmanuel Adebayor. Concern: Kyle Walker holds his hamstring Villas-Boas will be hoping for better news from Mousa Dembele. The Belgian midfielder has not played for Spurs since October 7 because of a hip injury and is struggling to be fit for the trip to Emirates Stadium. Spurs decided not to send Dembele for surgery to cure the problem but they have missed his energy and creativity in the centre and desperately need him to recover, with matches against Lazio, West Ham