Addressing the surprising line-up changes, Ten Hag spoke to TNT Sports ahead of the match. He reasoned: "We have some injuries and a suspension with Bruno, so we had to be creative. Also, we had some players who have a short turnaround to West Ham, so we've made some changes there and a different set-up, but not so much different because we want to keep consistency.
"Eriksen there, Mainoo as the No.6 and we bring Mazraoui into the No.10 position. I know him from before, sometimes played him there for Ajax, also playing him as a full-back, and also in our system he's playing in the half spaces, so he's capable of doing this job. He can do good pressing."
Ten Hag also hinted at further tactical flexibility, suggesting that Mazraoui's position might change as the game progressed.
"We can see during the game what is needed, so we maybe go with him in another position and maybe if needed, he can play a more offensive position and it's also possible to bring Casemiro in," he added.