<text>  Schalke have injury concerns over four players, including Benedikt Howedes and Klaas-Jan Huntelaar, for Tuesdays Champions League game at Real Madrid. Defender Howedes and former Real striker Huntelaar picked up knocks in Saturdays 3-1 Bundesliga win at home to Hoffenheim along with midfielder Marco Hoeger and forward Eric Maxim Choupo-Moting. Who will be able to play will be decided after the final training session, coach Roberto Di Matteo told a news conference on Monday. Klaas-Jan Huntelaar centre is an injury doubt for Schalkes Champions League game at Real Madrid . Schalke forward Eric Maxim Choupo-Moting picked up a knock in Schalkes win over Hoffenheim . Schalke goalkeeper Wetklo dives to make a save during a training session on Monday in Spain . Even without their injury problems, and midfielder Kevin-Prince Boatengs suspension, Schalke would be facing a formidable task at the Bernabeu after losing 2-0 to the holders in last months last-16 first leg in Gelsenkirchen. Real have stumbled recently in La Liga, losing top spot to Barcelona at the weekend after a 1-0 reverse at Athletic Bilbao, but should have little trouble getting past the Bundesliga side. Victory for Carlo Ancelottis men would equal the Champions League record for consecutive home wins 12 and break the record for the most in a row overall. Real matched Bayern Munichs competition-best run of 10 straight victories at Schalke. Schalke manager Roberto Di Mateo is facing a formidable task in trying to beat Madrid away . Schalke lost 2-0 to holders Madrid in the first leg of the last-16 clash in Germany last month . Schalkes players go through their paces in training as they prepare to play Madrid on Tuesday . We have to have a perfect day as a team and hope our opponent is not on super form, said Di Matteo who was coach of Chelsea when they won the 2012 Champions League. If we manage to get the first goal it will certainly be very, very interesting. The important thing is that we are solid and organised as a team. If we manage that we can dampen Reals attacking power. 