Manchester United's miserable season continued with a 3-2 home defeat by Galatasaray in the Champions League on Tuesday, while RC Lens forward Elye Wahi scored one goal and set up another as his side beat Arsenal 2-1.

United flew out of the traps in the Manchester rain, racing into a 17th-minute lead through Denmark striker Rasmus Hojlund.

Their advantage lasted less than six minutes however as Wilfried Zaha, playing against his former club, scooped home the equaliser after poor defending from the hosts.

After the break, Hojlund brilliantly capitalised on a slip from Galatasaray defender Davinson Sanchez to clip United back in front in the 67th minute, only for Kerem Akturkoglu to level four minutes later and stun Old Trafford into silence.

A mistake from United goalkeeper Andre Onana forced Brazilian midfielder Casemiro to conceded a penalty, which saw him sent off after receiving a second yellow card.

Mauro Icardi let United off the hook as he drilled his spot kick wide but the Argentine picked himself up and slotted home a fine winner nine minutes from time to send Galatasaray up to second in the group on four points and leave United pointless and bottom of Group A.

Bayern Munich are top on six points from two games after a 2-1 win at FC Copenhagen, who are third with one point.

"The mental errors we make, you cannot allow them at this level. You get punished. This is difficult to control," said United coach, Eric ten Hag.

Meanwhile, Lens celebrated the return of Europe's premium club competition to their turf in flamboyant style, coming from behind to beat Arsenal and leapfrog them into first in Group B.

20-year-old Wahi fed Adrien Thomasson for the first-half equaliser after Gabriel Jesus's opener, before netting the winner in the 69th minute to send the Bollaert-Delelis stadium wild.

Sevilla are second on two points, one ahead of PSV Eindhoven after the two teams drew 1-1 in the Netherlands.

Elsewhere, Real Madrid fought back to secure a barnstorming 3-2 win at Napoli in Group C, with the Italian side's keeper Alex Meret scoring an unfortunate own goal to hand the Spaniards victory late in the second half.

And last year's finalists, Inter Milan, beat Benfica 1-0 in Group D thanks to a brilliant second-half goal from Marcus Thuram. (Reuters)