Manchester United crashed to a second successive Champions League defeat on Tuesday, losing 3-2 at home to Galatasaray, while Lens stunned Arsenal 2-1.
Manchester City's perfect start to the Premier League season came undone in a shock 2-1 loss to Wolves, as Manchester United slumped to a 1-0 home defeat to Crystal Palace.
Manchester City crashed out of the League Cup with a 1-0 defeat at Newcastle on Wednesday as Arsenal, Chelsea and Liverpool booked their places in the last 16
Tottenham came from behind twice to rescue a pulsating 2-2 draw against Arsenal thanks to Son Heung-min's double in Sunday's north London derby.
Mikel Arteta expects Declan Rice to play a pivotal role in Arsenal's return to the Champions League as the England midfielder prepares to make his debut in the tournament against PSV Eindhoven.
Arsenal finally ended their six-year wait for a Premier League victory at Everton as Leandro Trossard fired the title-chasing Gunners to a 1-0 success.
Declan Rice scored his first goal for Arsenal and Gabriel Jesus added the icing on the cake as Arsenal roared back from a goal down to beat Manchester United 3-1 at the Emirates on Sunday
Premier League Highlights: Gabriel Jesus and Declan Rice scored in the stoppage time as Arsenal came from a goal down to beat Manchester United 3-1 in their Premier League match at the Emirates Stadium.
Arsenal will be squaring off against Manchester United in their next Premier League match on Sunday at the Emirates Stadium, London.
Last season's 3-2 win for Arsenal against Manchester United at a raucous Emirates was one of the most absorbing matches of the campaign.
Manchester City headline Pot A featuring Barcelona, Bayern Munich, Napoli, Paris Saint-Germain, Feyenoord, Sevilla and Benfica.
Raphael Varane has been ruled out for "a few weeks" as Manchester United's injury issues pile up ahead of their Premier League trip to Arsenal
Manchester United and Tottenham registered wins while Arsenal were held to a 2-2 draw by Fulham.
Title rivals Manchester City and Arsenal are two of only three sides with six points from their opening two games of the new campaign.
Martin Odegaard sealed a 1-0 victory for Arsenal against Crystal Palace on Monday.
David Raya will put Aaron Ramsdale's hold on the Arsenal keeper's jersey under intense pressure.
Newcastle finished fourth last season to qualify for the Champions League for the first time in 20 years and their rise under the control of the Saudi sovereign wealth fund shows no sign of stopping.
Arsenal edged out Nottingham Forest 2-1 in their Premier League opener on Saturday at the Emirates Stadium. However, the start of the match was delayed by 30 minutes.