A blunder by David Raya helped Lens come from behind claim a famous 2-1 victory at the end of one of Arsenal’s worst trips ever in the Champions League.

A careless pass fell short of Takehiro Tomiyasu and allowed Adrien Thomasson to equaliser before Elye Wahi wiped out Gabriel Jesus’ opener completely.

Travel chaos meant they did not reach their hotel till around midnight on the eve of the game and as well as throwing away three European points, they could now be without Bukayo Saka for the clash with Manchester City.

Despite picking up a knock late in the game against Bournemouth, Arteta decided to risk starting his star player from the start, only for him to limp off after just 34 minutes. Arsenal now face an anxious wait to see the England international can keep his run of 87 consecutive Premier League matches going with City due at the Emirates in just four days’ time.

Arsenal managed to take a brilliant early lead, albeit against a team currently struggling badly in the league after chasing PSG to the wire last season. However, Arsenal’s goalkeeper conundrum continues to haunt them as current preference Raya gave away the horror pass that led to Lens’ equaliser.

Worse still, the entire defence went missing in the second half when Elye Wahi pounced to steal all three points. Even so, most concerning of all perhaps is that Saka, who has been battling for fitness after a series of recent knocks, finally succumbed in the 34th minute and had to be replaced after collapsing to the ground.

He becomes an immediate doubt for the game against Manchester City back at the Emirates on Sunday – a match that could go such a long way to show if Arsenal really are ready to steal Pep Guardiola’s Premier League crown.