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 comes as England try to adjust to the challenges of playing in Mexico City, where the high altitude is expected to be a major factor during the knockout encounter at the iconic Estadio Azteca. Despite the disruption, England manager Thomas Tuchel insisted his players remain focused on the task ahead.See:Tuchel admitted that he had personally experienced some of the effects of the altitude in Mexico City, including headaches and difficulty sleeping, but stressed that the squad had adapted.“We feel it [the altitude]even if we don’t train,” Tuchel told reporters. “I felt a little headache in the hotel room all day and didn’t sleep like the previous days but nothing you can’t manage and can’t adapt to.”“I think the players feel it in the first minutes of the training session and the longer it goes on, they can cope with it better. This is exactly what it is. We can’t adapt physically, it’s impossible.The England manager also warned that Mexico’s aggressive approach on home soil, coupled with difficult conditions, could make the opening stages of the game more challenging for his side.“It’s not a coincidence that Mexico usually start their home games very strong, very aggressive because I think the first 15-20 minutes are probably the most difficult for us. Once we overcome that and we’ve experienced it a little bit now, I think we’re in a good place,” he added.England come into the game having beaten DR Congo 2-1 in the previous round, but face a tough challenge against a Mexico side that has yet to concede a goal in the tournament.