Basel are sweating on the fitness of Mohamed Salah ahead of this week's Champions League trip to Romania's Cluj. The Egypt forward sustained a thigh injury in Saturday's league defeat to St. Gallen and Basel said that he remains doubtful for the Cluj visit. Manager Heiko Vogel said he is hopeful that Salah will be fit for the game on Wednesday as captain and top scorer Marco Streller is also rated doubtful. Basel face a tough task to retain their position in the Champions League group stage, having lost 2-1 at home in the first-leg playoff against Cluj.