Raul Jimenez received treatment from medics for 10 minutes on the pitch after colliding with David Luiz before being stretchered from the field early on in the game.
Willian was pictured on Instagram at the Nusr-Et steakhouse in Dubai with celebrity owner Nusret Gokce, more commonly known as "Salt Bae".
Despite Gareth Bale starting for the first time, it was on-loan Carlos Vinicius who made an impressive debut as Tottenham enjoyed a 3-0 win in their Group J opener.
David Luiz had joined Arsenal from Chelsea last year on a one-year deal.
Sheff Utd vs Arsenal: Arsenal sit fifth in the Premier League table after a powder-puff performance that showed Unai Emery's rebuilding job is still a work in progress.
Arsenal vs Bournemouth: Arsenal edged up to third in the Premier League as David Luiz's first goal for the club earned a 1-0 win over Bournemouth.
Virat Kohli got a message of good luck from Brazil and Chelsea star David Luiz.
Centre-back David Luiz has been a mainstay in Maurizio Sarri's Chelsea this season.
Chelsea's opening seven Premier League games have yielded five wins and two draws
Courtois, 26, has a year remaining on his contract and has been repeatedly linked with a move to Real Madrid
Chelsea star David Luiz shrugged off the brutal foul on him which saw Sergio Aguero sent off late in the 3-1 win over Manchester City.
David Luiz is a beneficiary of the Premier League's first billion-pound spend, and is back just two years after he became the world's most expensive defender with a 50 million pound move to Paris Saint-Germain
Brazilian international Luiz is scheduled to return to Paris after his country's 2018 FIFA World Cup qualifier against Peru on Tuesday
David Luiz suffered a knee injury during Brazil's 2-0 defeat against Chile in World Cup qualifier on Thursday.
Paris Saint-Germain delivered an emphatic performance in front of home fans as the team defeated Barcelona F.C. 3-2 in Champions League.
Thiago Silva will miss Ligue 1 games against SC Bastia, Evian and Saint-Etienne and probably Brazil's friendlies in the United States next month against Colombia and Ecuador.
David Luiz put aside Brazil's World Cup debacle to help his new club - Paris St Germain - beat Napoli 2-1 in a friendly. His national captain Thiago Silva though trudged his way out early into the match.