Gabriel Jesus pushed Arsenal into the last 16 of the Champions League with a double in Tuesday's 3-1 win at Inter Milan which made the Gunners mathematically sure of a top-eight finish.

Two close-range finishes in the first half gave Arsenal a deserved seventh straight league phase win at the San Siro and manager Mikel Arteta a selection conundrum with Manchester United visiting the Emirates Stadium on Sunday.

Jesus started in place of summer signing Viktor Gyokeres, who has struggled this season but made sure of the win with a fine shot in the 84th minute, and the former Manchester City striker offered a threat all game.

The 28-year-old had only started twice this season before Tuesday's win but appears to be back to his best after returning from a cruciate ligament tear which kept him out for nearly a year.

"It's a dream night. I always dreamed of being a footballer. I watched when I was a kid. I watched a lot of Serie A, so to be here in this stadium and score here is tears in my eyes because I always dreamed of being here," Jesus told Amazon Prime.

"There is always a reason that things happen even whether it's good things or difficult things. I learned that during my 11 months out of the field."

Arsenal are now on 21 points and were effectively in the last 16 before kick-off as 16 points was enough to be in the top eight last season.

But the 28-year-old was key to Arsenal going six points clear at the top of the classification ahead of second-placed Bayern Munich's home fixture with Union Saint-Gilloise on Wednesday night.

Inter, who levelled through a fabulous Petar Sucic strike in the 18th minute, sit ninth after losing a third straight match in Europe's elite club competition for the first time in their history.

The Serie A leaders dropped out of the top eight and their maximum possible points tally of 15 – should they win at Borussia Dortmund next week – means Inter are looking at the playoffs even after winning their first four matches. (AFP)