However, Emery said Welbeck has shown he can play all over the pitch: "Danny Welbeck is one of the players who has a multi-position possibility".
The striker scored ten goals in thirteen appearances after he joined Arsenal on the last day of the January transfer window and Unai Emery has tipped the 29-year-old to be a contender for the Premier League Golden Boot this year.
Unai Emery's first game is charge is certainly a daunting one and his record in Spain against Pep Guardiola isn't one that will inspire the Arsenal faithful, Emery is 0 from 10 against Guardiola. Guardiola's side looked unstoppable for the first half an hour but then took their foot off the gas and allowed Arsenal back into it, although they won at a canter.
"I said to him when he arrived with us after the holidays, I want the best performance in his career from this player - and to work for that", Emery said.
"We spoke at half time about taking more responsibility for the second half, to do a little more".
MF Matteo Guendouzi, 5 - It was a huge call on Emery's part to select the youngster, who last season was playing in the second tier of French football.
Pierre-Emerick Aubameyang starts up front, with Alexandre Lacazette among the subs. Of course our average level is high, but I have a feeling still we can improve. It was a fantastic game for us, so now we have to keep going.
'We spoke also Petr did a very good pre-season, also today I think he played good also. "He has this experience for continuing to defend our goal", Emery said.
It was worth noting that Arsenal were largely wasteful in their counterattacking attempts as a lot of chances went to waste because of poor execution in the final third.
Emery said he did not know the status of Maitland-Niles' injury, but said Monreal could be ready to face Chelsea at Stamford Bridge next weekend.