Olivier Giroud sat behind the home dugout here, descending ever deeper into his new training coat as if attempting to hide from all he was witnessing. So much of this new start would have reminded him of his darker days at Arsenal. Only 24 hours previously he had been summoned from the bench in South Wales as his old team succumbed to Swansea, then the Premier League’s bottom club. Now, having been prised away by the champions, he endured having to watch his new side capitulate against another team apparently threatened by the drop.
The Frenchman was supposed to have left nights like this behind. Instead he shivered in disbelief as Chelsea succumbed to their worst home defeat since April 2016. Bournemouth were excellent, rugged when they needed to be and ruthless in a blistering spell after the break, and ended up running riot. Their first three-goal haul away to a top-six opponent must rank as their most startling top-flight victory, a game which exposes their previously lowly position as a deception.