Ole Gunnar Solskjaer felt referee Jon Moss did not do enough to protect Manchester United winger Daniel James during their Premier League draw with Wolves.
Solskjaer gave James his full debut after he scored in the 4-0 win over Chelsea as a substitute but the left winger struggled to perform on the right flank and was substituted late on for Mason Greenwood.
James was booked for simulation midway through the first-half yet replays showed Wolves midfielder Joao Moutinho made contact with the winger as he approached the final third. The Welshman was earlier accused of diving by Wolves fans on 10 minutes but was not cautioned and the hosts counter-attacked.
Despite James' ineffectual outing, he still suffered robust fouls in each half and Solskjaer suggested the Wales international should have won more free-kicks.
"For me, we never got a foul on the first one," Solskjaer said. "They got a counter-attack, he was fouled, and they got a chance from it almost.
"He's that quick and he gets kicked so many times that it's natural sometimes to protect himself. I haven't seen [the 'dive'] other than live. And, for me, how many fouls did he suffer today? How many times did they go through him?
"I have got absolutely no problem if he sometimes tries to avoid being kicked."
United lost both of their league and FA Cup games at Wolves last season and were more accomplished in their first away fixture of the campaign at Molineux. Although Paul Pogba squandered the chance to take United to the Premier League summit, Solskjaer was encouraged by the manner of United's performance.
"First-half today was very much our half," Solskjaer said. "Then first 10 or 15 of the second-half was poor and then we got back into the game again, so I'm very pleased, they've learnt on the hob today.
"We gave a couple of sloppy transitions away, counter-attacks, because we passed it, we were too eager to play the pass through sometimes, one extra pass before we play the killer pass.
"But we're improving all the time and we will improve a lot because the boys want to learn, which is evident from the first game until now, we've only improved."