Manchester United failed to ease the pressure on Michael Carrick as they were beaten 2-0 at Atletico Madrid in the Champions League after Leny Yoro’s controversial second-half sending off.

In an extraordinary post-match interview, Lisandro Martinez called out the United hierarchy over a lack of investment in the summer and said "this is not a Champions League-quality squad".

United, now winless in five games, failed to address the concerns around how easy they are to play against when Atletico opened them up with a simple ball over the top and took the lead through Pablo Barrios after just 47 seconds.

Ademola Lookman put the game beyond doubt for Atletico Madrid with just over 10 minutes to go shortly after Leny Yoro was controversially shown a straight red card following an on-field review by referee Glenn Nyberg.

The France international was deemed to have denied Atletico's Jonathan David a goalscoring opportunity after a coming together between the pair just inside United's half. "It is soft! No way, that should not be a red," Clinton Morrison said on Soccer Special.

Atletico had a second goal ruled out following an on-field review from the referee just before half-time with Marcos Llorente judged to have handled the ball when his arm was in an unnatural position before Johnny Cardoso scored from the edge of the box.

United were always second best on the night but had more than enough opportunities to equalise at 1-0 with Bryan Mbeumo sending a deflected shot narrowly wide and captain Bruno Fernandes hitting the bar after spurning a decent opening on the break.

However, United, who remain on three points in the Champions League, can have no complaints about losing in Madrid after yet another disjointed performance which only adds to the scrutiny on their head coach ahead of a Sunday's trip to Leeds in the league, live on Sky Sports.

Key moments in Madrid

1: GOAL! Atletico lead after 47 seconds as Barrios squeezes the ball past Heaven on the line after a simple ball over the top unlocks Man Utd

13: CLOSE! Mbeumo's goal-bound shot is deflected narrowly wide in Man Utd's first chance

24: SAVE! Oblak keeps out Mbeumo's shot from the angle inside the box.

25: CHANCE! Unmarked at a corner Man Utd's Baleba heads straight into the arms of Oblak

27: POST! Grimaldo hits the frame of the goal with a free-kick Atletico

45: GOAL DISALLOWED! Atletico's Cardoso has strike ruled out following VAR review due to a handball by Llorente in build-up

55: POST! Alvarez's left-footed volley beats Lammens but hits the frame of the goal as Atletico threaten to extend their lead

58: MISS! Fernandes spurns a chance created by Tielemans' ball over the top as Man Utd chase equaliser

75: RED CARD! Yoro is sent off following an on-field review by the referee for denying David a goalscoring opportunity

79: GOAL! Lookman doubles Atletico's lead on the rebound to seal the win

Martinez calls out Man Utd hierarchy

Lisandro Martinez speaking to Amazon Prime:

"I have to control myself a lot but sometimes it's a reflection of how our club is at the moment. We had a fantastic season last season and now we expect more from the top, from the people upstairs, to bring in more players to compete, because many teams have signed a lot of players as well.

"Atletico have an amazing team. They deserved to win today, and this is not a Champions League quality squad.

"I expect more [investment]. 100 per cent. I expect more from our technical director [Jason Wilcox]. I have to be honest, as players we have to do more but it is also important when you make a strong squad to be ready for this kind of night."

On whether he expected more investment in the summer: "Yes, of course. The players can do more but it's also important to build a strong squad to be ready for these kinds of nights.

"Last season we did everything. We created a base to build an amazing team but now we have to be honest and prove something. It's annoying and disappointing to come here and not see my team trying to get an amazing result."

On whether the manager was backed enough in the summer: "I don't think so. He does his best but every season is different. You can't stay with what you did last season. Teams know how you play; they know every detail. If you don't change, it's a big problem.

"It's easy to blame the coach, and it's easy to blame the players, but we also have to look at other areas."

Man Utd's next fixtures...

Leeds (A) - Premier League - Sunday October 18, live on Sky Sports

Como (A) - Champions League - Wednesday October 21

Bournemouth (H) - Premier League - Sunday October 25, live on Sky Sports

Chelsea (A) - Premier League - Saturday October 31

Roma (H) - Champions League - Tuesday November 3

Aston Villa (H) - Premier League - Sunday November 8, live on Sky Sports