The 28-year-old France international collided with Tomkins in the 76th minute at the Emirates and appeared to be dazed by the clash, but was left on the pitch after being assessed by his team's medical staff.
West Ham United, reduced to 10 men after defender James Tomkins was sent off in the first half, won 5-3 in a penalty shootout against Maltese Cup winners Birkirkara to scrape into the Europa League third qualifying round on Thursday.
Tottenham Hotspur's Harry Kane pounced on a piece of comical defending to secure a 1-0 win over Sunderland in the Premier League on Sunday although he was later wheeled away on a stretcher after suffering an ankle injury.
Daley Blind's injury-time equaliser rescued a 1-1 draw for Manchester United against West Ham United on Sunday but a point was not enough to regain third spot in the Premier League.
Newcastle's worries deepened as they now remain at 19th in the table.
Manchester United ended a momentous evening hinting at a brighter future after reaching the semi-finals with a 2-1 victory.
A round-up of the action in the English Premier League on Monday.
Images from action in the Spanish Super Cup and English Premier League
IMAGES from EPL matches played on Saturday.
Images from Sunday's action in the Premier League.
Leicester will remain second overnight with Everton, level on points with them, not playing later on Monday after their home match against Manchester City was postponed following more positive COVID-19 cases at City.
IMAGES from the English Premier League match played at Selhurst Park in London on Monday
A double from Harry Kane, who scored in his fifth consecutive club match, inspired Tottenham Hotspur to a 4-1 win over London rivals West Ham United in the Premier League at White Hart Lane on Sunday.
Images from the English Premier League matches played on Saturday
A Curtis Davies own goal gifted West Ham United a point after Hull City had twice taken the lead in a frenetic 2-2 draw in the Premier League on Monday.
Arsenal suffered another painful Premier League defeat as Swansea City capitalised on some glaring errors to win 3-1 on Tuesday, boosting their survival hopes and denting the visitors' top four chances.
Steven Gerrard's future at Liverpool may be in doubt but the captain turned back the clock to score in a 3-1 victory at bottom side Leicester City in the Premier League on Tuesday.
IMAGES from Saturday's English Premier League matches.
Sergio Aguero struck twice as Manchester City came from behind to beat Burnley 2-1 at Turf Moor in the Premier League on Saturday.
With Liverpool still to visit Chelsea, who trail them by nine points with two games in hand, Juergen Klopp's side may have to beat Brighton & Hove Albion on May 13 and rely on their superior goal difference to qualify for the Champions League, assuming they do not secure it by winning this year's trophy.
Mohamed Salah struck four times in rampant Liverpool's 5-0 thrashing of Watford that lifted them back into third spot in the Premier League on Saturday.
IMAGES from Saturday's English Premier League matches.
Chelsea came from behind to secure a 3-1 win at Manchester City and forge further clear at the top of the Premier League as a dramatic top-of-the-table clash ended in a mass brawl and two City players being sent off on Saturday.