Real Madrid midfielder Sami Khedira has warned against underestimating Galatasaray as his side prepare to take on the Turkish Champions in the Champions League quarter-finals.

Fatih Terim’s men have grabbed the headlines of late as they followed up the acquisitions of Wesley Sneijder and Didier Drogba in January by beating Schalke 4-3 on aggregate to reach the last eight for the first time in 12 years.