England’s preparations for their FIFA World Cup Round of 16 clash against Mexico were disrupted after hundreds of home supporters gathered outside the team hotel in the early hours, using drums, trumpets and fireworks in an apparent attempt to keep the players awake.The incident came as England were already trying to adjust to the challenges of playing in Mexico City, where the high altitude is expected to be a major factor during the knockout clash at the iconic Estadio Azteca. Despite the interruption, England manager Thomas Tuchel insisted his players remained focused on the task ahead.Take a look:Tuchel admitted he had personally felt some of the effects of Mexico’s altitude, including headaches and difficulty sleeping, but stressed the squad had adapted.“We hear it [the altitude]even if we don’t enter,” Tuchel told reporters. “I felt a slight headache in the hotel room throughout the day and I didn’t sleep as well as the days before, but nothing you can’t handle and can’t adapt to.”“I think the players felt it in the first minutes of the training session and the longer it went on, they could face it better. It’s just what it is. We can’t adapt physically, it’s just impossible. But we’re here a day earlier to experience at least, so that we don’t have all the first experience tomorrow.”The England manager also warned that Mexico’s aggressive approach on home soil, combined with the difficult conditions, could make the start of the match particularly challenging for his team.“It is not a coincidence that Mexico usually starts its matches at home, usually very strong, very fronts, very aggressive because I think the first 15-20 minutes will be perhaps the hardest for us. Once we overcome this and we have experienced a little already today, I think we are in a good place”, he added.England come into the match having beaten DR Congo 2-1 in the previous round, but face a stern challenge against a Mexico side who are yet to concede a goal in the tournament.