#3 Flop: Wesley Hoedt
It was difficult to separate the two Southampton centre-backs, in terms of which one performed worse here.
However, I'm going with Wesley Hoedt. At 24, he's already made appearances in the Serie A, Eredivisie and also for his national side too, the Netherlands. He joined for a reported £15m last summer, seen as a Virgil van Dijk replacement and despite being as highly-regarded as he is, this performance just reiterated his glaring flaws.
He's not the quickest defender but his general positioning here was awkward and ultimately cost him. Stephens himself can be error-prone, but Hoedt was the player who needlessly gave away the free-kick - from which Walcott broke the deadlock.
He was shown a booking shortly afterwards yet continued in the same fashion, either finding himself overwhelmed by Cenk Tosun's hold-up play or being given the runaround by any of Everton's quicker forward players.
The only Southampton starter barring Nathan Redmond who failed to complete a tackle, that doesn't make for good reading. Four clearances, one interception and blocked shot, he committed two fouls and was exposed frequently as Everton went in search for more goals.