The match between the two former champions will feature around £100m of new talent after their summer dealings.
On Sanchez and Ozil's final year of contract, Wenger said: "When a player goes into the final year of their contract we will try to extend the contract because there is no reason we shouldn't do it, but we are not there yet".
There were restless supporters who came late and missed the first two goals, went for a half-time hot dog and missed Welbeck's goal, and then abandoned ship before Ramsey and Giroud had their say.
The north London-based club finished last season in fifth-placed.
The Chile international has less than 12 months remaining on his contract leading to intense speculation that he will be depart the Emirates this summer. A great run of passes saw Mohamed Elneny finding an unmarked Lacazette for headed goal.
"I politely asked the coach of Middlesbrough and the two referees if he could leave one field and come on to the other".
The first touch from the €60 million euros signing was at kick-off. Then, Arsenal overcame 3-2 deficit with less than 10 minutes to play.
"After that, we get the efficiency".
"However, just to remind you we have 33 players and they are all good players".
Mourinho won the league in his second seasons at Porto, Real Madrid and Inter Milan, as well as in both of his stints at Chelsea, but he expects this season s title race to be an almighty scrap.
"But when it doesn't happen, you still have to fight and manage to keep your motivation at the highest level". It didn't get better when new signing Gervinho was sent off on his debut for slapping Joey Barton as Arsenal failed to break down Newcastle.
"It's true that in recent years we have [often lost the opener], down to some special circumstances, sometimes because it's after the World Cup or after the European Championship when we have many players who were not ready to start the season", Wenger said this week.
DESIblitz brings you everything you need to know for the 2017/18 Premier League season.
"Without a shadow of a doubt he's had coach influence and support from the club, but he's from a tough background".
"I don't want him to go".
Fuelled by an historically lavish spending spree, the Premier League returns on Friday when Arsenal host Leicester in the opening game of the hotly-anticipated new season.
Speaking to Sky Sports, Merson admits he would be happier if the 28-year-old moved abroad instead of - just like van Persie - joining and therefore bolstering a Premier League rival.
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