Erik ten Hag says Alejandro Garnacho was “not good enough” in his previous starts this season after the Manchester United teenager scored in the Carabao Cup victory against Crystal Palace.

Having secured a much-needed Premier League victory at Burnley on Saturday evening, the Red Devils ran out comfortable 3-0 victors against Roy Hodgson’s south Londoners on Tuesday night.

Casemiro scored and then crossed for Anthony Martial’s goal on a night started by Garnacho impressively putting the Carabao Cup holders ahead from Diogo Dalot’s cutback.

The 19-year-old began United’s first two matches of the season, but this was the first time he was named in the starting line-up since the defeat to Tottenham five weeks ago.

“You have seen at the start of the season we played him and then his contribution was not good enough,” manager Ten Hag said of the Argentina international.

“But he also had some good actions. You see always he is a threat in the game even when he is not playing that well.

“He has to learn when he does his job in defending he will always have his moment and he will always be decisive because he has great qualities.

“As well, it’s not only off the ball. But I want to see like today, he is entering the box in the right spot to finish.

“But I think it is quite normal for a player of his age that there is space for a lot of improvement.

“Everyone likes him, the fans like him, the team likes him, I like him but we also have to demand from him and push him because he can act on a very high level but he has to show it every day.”

United made seven alterations, as did Palace, ahead of Saturday’s Premier League reunion at Old Trafford.

Ten Hag will hope Christian Eriksen and Scott McTominay can return from what the United boss called illness, so too left-back Sergio Reguilon.

The on-loan Tottenham full-back’s absence meant Sofyan Amrabat filled in there on his first start for the club, before stepping into midfield at half-time.

“Sofyan is a player, and that was one of the reasons we signed him, where the team needs him, he will play and he can play in more positions,” Ten Hag said.

“Every player has his best position but he gives a certain dynamic in the game. We have seen today but also for him and many players, we just started.

“That process was a little bit interrupted by the many injuries we have because when you can play a long time with the same team then you get routines, the players learn each other and it’s more automatic.

“You see Mason (Mount), Amrabat, you see also others, they can contribute to our game and they will do.”

As for Palace, Roy Hodgson had no arguments with the result as his side made a meek Carabao Cup exit in the third round.

“I thought we were well beaten, basically,” said the Eagles boss, who saw Dean Henderson go off injured on his debut at former club United.

“I thought they attacked better than we did, defended the few attacks we were able to mount quite comfortably.

“As a result, unfortunately, you tend when that happens to only be looking at one possible result and that was the result they came up with.”

Arsenal captain Martin Odegaard admits there needs to be a period of adaption to new Premier League rules.

The Gunners won 1-0 at Crystal Palace on Monday night courtesy of a second-half Odegaard penalty but the visitors had to survive the last quarter of the game after Takehiro Tomiyasu was dismissed.

Japan defender Tomiyasu was sent off at Selhurst Park, picking up a soft yellow card for a foul on Jordan Ayew just seven minutes after being cautioned for perceived time-wasting at a throw-in.

The new remit for officiating this season has called, among other changes, for a clampdown on time-wasting – although Arsenal boss Mikel Arteta suggested a stopwatch may be needed to prevent inconsistencies in the ruling.

Odegaard, who tucked away his spot-kick after Eddie Nketiah had been tripped by Palace goalkeeper Sam Johnstone, believes the changes will take some getting used to.

“I don’t know if it’s difficult but it’s new rules so we have to adapt,” he said.

“The first yellow card was harsh, I don’t think he (Tomiyasu) was trying to take a lot of time, he just didn’t have anyone to play to. It’s a bit tricky but we have to adapt. That’s the reality, we can’t do anything else.

“It’s easier to get yellow cards now so you have to be careful and that goes for me as well.

“It’s something to have in mind but I don’t think we should think too much about the rules. We should stay focused on the game.”

Arsenal hung on to seal victory with 10 men, meaning they are one of only three teams to have won their opening two Premier League games of the fledgling new season.

Asked if winning was more important than performances at this stage of the campaign, Odegaard replied: “It’s crucial. The start of the season is always tricky, it takes a bit of time before everyone finds their rhythm and their top form.

“So, it’s crucial to still get the three points and build on it from there. I’m very happy to win and I’m sure we’ll get better and better with every game.

“It was difficult, we had to dig deep and fight for it. When you come here you have to be able to suffer and we knew that before the game. We did that brilliantly and we deserved the three points.”

Palace struggled to truly test Aaron Ramsdale in the Arsenal goal, even when they had a numerical advantage.

Despite falling to their first loss of the season, defender Joachim Andersen felt the Eagles had held their own against one of the favourites for the title.

“I think the penalty changed the game and we did everything in our power to come back,” he said. “We did really well to do that, but we didn’t create that clear-cut chance to make the equaliser. That’s just unfortunate.

“Everyone gave everything and you could see in the dressing room people were disappointed and tired. In the end, we did what we could do.

“You could see in our game after the red card we were the only team on the pitch. We were playing around their box for almost 20 minutes, but we couldn’t create that clear-cut chance. That one goal was the difference.”

Mikel Arteta may have “loved” Arsenal’s narrow win at Crystal Palace but believes a stopwatch may be needed to iron out inconsistencies in time-wasting after Takehiro Tomiyasu fell foul of the rules.

The Gunners won 1-0 in south London as Martin Odegaard’s second-half penalty proved the difference.

Japan defender Tomiyasu was sent off at Selhurst Park, picking up a soft yellow card for a foul on Jordan Ayew just seven minutes after being cautioned for perceived time-wasting at a throw-in.

The new remit for officiating this season has called, among other changes, for a clamp down on time-wasting but Arteta believes the timing did not add up on Tomiyasu’s booking.

Asked about the rule changes, the Spaniard replied: “For me it is not an issue. The referee makes that call.

“And we are consistent with that. They explained it. The only thing we are asking for is consistency. If not we need to play with a stopwatch to understand what is it and what is not.”

Arteta did not agree when told Tomiyasu had waited 23 seconds to take the throw-in before being cautioned – replying: “It wasn’t. I think it was eight seconds. We might have to play with a stopwatch.

“This is the standards.”

Despite the red card, Arsenal made it two wins from two following on from the opening-day victory over Nottingham Forest.

Odegaard stepped up to tuck away a penalty after Eddie Nketiah – who had hit a post in the first half – was tripped by Palace goalkeeper Sam Johnstone.

“I loved it, absolutely loved it,” Arteta said of the win.

“It’s a really difficult place to come, we played the way we wanted to play 11 against 11. We dominated the game, we created enough chances, we missed two very, very huge chances.

“We scored the penalty and then we have to play half an hour with 10 men. It’s a conflict we didn’t prepare for but we had to adapt and the players were fantastic.

“I don’t think we gave anything away. The subs were great, the way they came out, the concentration, the focus, how much they helped the team, the coaching. They changed momentum in many occasions of the game. So really happy.”

Eagles boss Roy Hodgson was in a reflective mood and felt his side put in a good showing despite coming out of the contest with no points.

“I would be tempted to say we deserved something from the game,” he said.

“When they went down to 10 men we gave it our best shot but they are a top-quality team and they were able to defend the efforts we had.

“They got a lot of bodies around the goalkeeper so we couldn’t get through the cordon but that is often the case.

“There were very few disappointments in the game for me in terms of the Crystal Palace performance. On another day I think we would be feeling even happier and proud of ourselves.”