And it is on the training pitch during the week that so many disciplines are taught and drilled that ultimately come to fruition when performed in the white-hot atmosphere of a Premier League match.
The Gunners extended their unbeaten to 20 matches after their victory over Spurs and a 2-2 draw with United on Wednesday evening.
The midfielder, who has not featured in any of United's past four league matches, has lost his place in the Brazil squad after struggling to make an impression at Old Trafford.
Ozil's post-World Cup fall out with Germany can not have helped either, coming at a time when every Arsenal player knew he had to impress the new man after years of inertia under Wenger. "It's one reality. The consequences of many things".
Fulham manager Claudio Ranieri welcomed his old club Leicester City to Craven Cottage and shared the spoils in a 1-1 draw while Everton were held 1-1 at home by Newcastle United.
Tuttosport indicate Todibo is in the Reds' sights, with Manchester United and Juventus also sniffing around the 18-year-old.
Jose Mourinho has had a tough start to the season, but Diogo Dalot is thrilled to be playing under his compatriot (Martin Rickett/PA).
Asked on Friday when United, now eighth in the Premier League, will challenge for the title again, Mourinho said: "I don't know".
"You need time to invest, work hard, create a philosophy, a methodology and I think what Tottenham have is a clear idea about philosophy and methodology and then of course trying to keep your best players, trying to be competitive".
"The problem they have is the players are so well paid, they can't (get rid of them) because they've signed three or four year contracts on the type of money you're not going to get elsewhere".