Erik ten Hag says there can be no excuse for Manchester United's "unacceptable" second-half display after they let a two-goal lead slip in Saturday's 2-2 draw with Aston Villa.
Jadon Sancho's third goal of pre-season and a Matty Cash own goal put United in a commanding position at half-time in the friendly at Optus Stadium in Perth.
However, the Red Devils were unable to see out a fourth win in four outings, as Leon Bailey pulled one back and Calum Chambers headed in a 93rd-minute leveller.
While disappointed his side dropped off after the break, Ten Hag is glad it happened in a friendly rather than in a competitive contest.
"I said in the dressing room, a drop of focus is unacceptable, but I'm happy because now I can tell them it cannot happen [again]," he said in his post-match news conference.
"[At the start of the second half you] have to get out of the dressing room and back in your plan and your focus and back to your performance and that is what we didn't do.
"We had a lot of movement behind the defending line, scored two great goals, so we were 2-0 up at half-time, and then our focus dropped."
United's fourth and final friendly in 11 days on their tour of Thailand and Australia was played in wet conditions, with concerns raised over the quality of the pitch ahead of kick-off.
Ten Hag did not want to use the playing surface as a reason for their shortcomings.
"It can be that the guys are tired, but that's not an excuse. They have to perform and it is what we didn't do in the second half," he said.
"It was the focus. I don't want to make excuses about the pitch or weather. No matter what, we have to perform.
"Football is a sport of mistakes and we have to decrease the mistakes. That's clear, but I have seen a lot of progress in these two weeks.
"In the first half I saw really good football, really controlling and dominating the game, but we have to learn from what happened in the second half.
"It's not possible that you go 2-0 [ahead] and then throw it away."
United face Atletico Madrid and Rayo Vallecano next weekend in their final outings ahead of taking on Brighton and Hove Albion in their opening Premier League match.
Al-Nassr 5-1 Al-Ain: Ronaldo on target in AFC Champions League win
Cristiano Ronaldo powered Al-Nassr to a convincing 5-1 triumph over Asian Champions League Elite holders Al-Ain on Tuesday.
The victory carried a sense of redemption for Al-Nassr as they avenged last season's semi-final defeat to the same opposition on their way to lifting a second title in the competition.
Talisca fired the hosts into a fifth minute lead with a well-taken effort from the edge of the box before Ronaldo poked home his 908th career goal just after the half-hour mark.
Visiting defender Fabio Cardoso then deflected Angelo's effort beyond Khalid Eisa to hand Al-Nassr a comfortable advantage at the interval.
Al-Ain did, however, pull one back early in the second half when Park Yong-woo's strike struck the post and went in off the back of Al-Nassr goalkeeper Bento.
But the result was put beyond doubt late on when Wesley curled home Al-Nassr's fourth, before Talisca notched his brace in second half stoppage time.
Data Debrief: Return of Ronaldo
After winning five Champions League across his glittering career, Ronaldo is now eyeing a first AFC Champions League crown with Al-Nassr.
The 39-year-old has six goals in eight appearances in the competition, with his goal against Al-Ain ending a three-game goal drought for Al-Nassr.
Ronaldo also registered a team-high expected goals (xG) tally of 1.25 towards Al-Nassr's 2.67 total, while also producing more shots (eight) and touches in the opposition box (nine) than any other player on the pitch.
Neymar suffers fresh injury blow
Neymar sustained a new injury as he was forced off during Al-Hilal's AFC Champions League Elite win over Esteghlal.
Aleksandar Mitrovic plundered a hat-trick on Monday to seal a 3-0 win.
But Al-Hilal's victory was soured by an injury to Neymar, who had to make way just 29 minutes after he came on as a second-half substitute.
The Brazilian, who has just returned from over a year out of action following a serious knee injury, was forced off with what appeared to be a thigh issue.
Indeed, Monday's appearance was only the 32-year-old's second for Al-Hilal since his comeback.
He has featured just seven times for the Saudi Pro League champions in all competitions since his big-money move from Paris Saint-Germain in 2023.
Amorim: Man Utd will think 'new Alex Ferguson has arrived' if Sporting beat Man City
Ruben Amorim joked Manchester United fans will think he is the next Alex Ferguson if Sporting CP manage to beat Manchester City in the Champions League.
The head coach has agreed to join the Red Devils and will take charge from November 11 after signing a contract with the club until the end of the 2026-27 season.
Before then, he has two games left in charge of Sporting, starting with their Champions League match against Pep Guardiola's men on Tuesday.
Sporting have made a perfect start to the Primeira Liga, winning all 10 of their games, and have made an unbeaten start in Europe, but Amorim is prepared to come under more scrutiny while on the touchline against City.
"Winning tomorrow would be brilliant. Would I be a hero at Manchester United before I land? I don't think about that, my focus is on winning the game for Sporting," Amorim told a press conference.
"The inferences that people will draw from this game are not important to me because they can be misleading. If the result was very negative, expectations will be lowered, and I don't think that is a bad starting point when I start at United.
"If we win tomorrow, they will think that the new Alex Ferguson has arrived and that will be very difficult to maintain. What interests me is to win tomorrow, to have a farewell at Alvalade, then win in Braga and then start in Manchester.
"It can increase or decrease expectations. I don't know what is better. I want to leave the fans and the players happy and confident and qualify the team for the play-offs."
Sporting won their first European meeting with City in March 2012 in the Europa League, but are winless in their last three against them (D1 L2).
However, they are unbeaten in their first three Champions League games so far this season, and if they avoid defeat on Tuesday, they will equal their longest-ever unbeaten run in the competition (four between September 1982 and March 1983).
The 39-year-old boasts the best win ratio of any Sporting coach on record in the Primeira Liga, winning 120 of his 156 such games in charge (76.92%), but captain Morten Hjulmand said the team are ready to prove they do not need Amorim, who agreed with the sentiment.
"Yes, [Sporting is prepared for his departure]. You heard Hjulmand say that they no longer need the coach," he added.
"They are very mature; they understand the game very well. They are prepared, it won't make any difference in the end.
"There is a change, of course, but the team is prepared and has enough maturity to move forward."
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