Defender was injured playing for Brazil against Senegal

Havertz has ‘minor relapse’ in recovery from knee injury

Arsenal fear that Gabriel Magalhães could be out of action for at least a month after he sustained a thigh injury on international duty last week, with the Brazil defender expected to miss a crucial part of the season for the Premier League leaders.

Gabriel limped off during Brazil’s 2-0 win against Senegal in a friendly at the Emirates Stadium on Saturday and returned to the club for more tests this week after it was confirmed he had sustained a muscle injury in his right thigh.

The tests are understood to be continuing and Arsenal have yet to confirm how long the influential 27-year-old will be absent, although he is not expected to be available for the north London derby against Tottenham on Sunday or the Champions League meeting with Bayern Munich three days later.