It wasn't always pretty, but Arsenal started the Emirates Cup with a resounding victory over Benfica.
The visitors opened the scoring when Franco Cervi's effort was deflected past his own keeper by Per Mertesacker.
Two goals in eight minutes from Theo Walcott put the home side in front but Eduardo Salvio levelled before the break.
An own goal from Lisandro Lopez restored Arsenal's lead before Arsene Wenger's men pulled away with goals from Olivier Giroud and Alex Iwobi.
Here are five things we learned from the Emirates...
1. Stars of the future
An insight into things to come for Arsenal – particularly in the case of 17-year-old Nelson. A bit premature for Hector Bellerin to be looking over his shoulder but should the Spaniard prove susceptible to the overtures from Barcelona, Reiss Nelson will be there to take his place. Quick, strong and with a decent touch. Ainsley Maitland-Niles has pace but needs more awareness. He was guilty of giving away possession that led to the second Benfica goal from Salvio.
2. Bargain buy Sead Kolasinac
Yes, those bargains are still out there. Important to remember that there will be more testing examinations than a pre-season tournament on home turf but Kolasinac impressed. He never sees any cause as a lost one and it was that quality that enabled Theo Walcott to score his first goal. And it was his pass to Francis Coquelin that set up the England winger's second. But there is no question that Arsenal have made a quality signing. Credit to chief scout Steve Rowley.
3. Granit Xhaka has learned from his first season
He spent most of last season proving how tough he was. Afraid of nothing our Granit. One problem – the timing of his tackles did not match his enthusiasm and the cards of both colours came thick and fast. He appears to have now brought more composure to his game and if he can harness the reckless streak as he did yesterday, then he will be more of an asset than a liability.
4. Rob Holding progressing well
A big season for Holding ahead. He excelled in the FA Cup final against the belligerence of Diego Costa but now the expectations are higher. To be honest, he did not do himself justice in the first half against Benfica. He was caught out of position too often and casual in his distribution. He was taken off at half-time and replaced by Calum Chambers. Maybe that was always manager Arsene Wenger's plan but Holding did little in the first half to persuade Wenger to adjust his thinking.
5. Theo Walcott has a test of character ahead
There is no question that on his day Walcott is unstoppable. Lightening quick and with an eye for a goal. But he suffered last season when Wenger changed tactics. It cost him his place at Arsenal and also with England. Walcott is equipped to play a major role for club and country. He has the talent – now he has to prove his has the tenacity. Two goals yesterday and a cross that was deflected into the net for Arsenal's third. He gave to Alexandre Lacazette for the last 14 minutes. It gave the Emirates fans their first glimpse of the £52 million Frenchman. And it gave Walcott a glimpse of the competition he will face this season.