Kyle Walker urged Milan team-mate Joao Felix to pass the ball rather than trying to play like Lionel Messi at half-time of their defeat to Napoli on Sunday night.
Milan went a goal down inside two minutes in Naples after former Chelsea centre-forward Tammy Abraham failed to find Felix with a flick-on. Napoli went up the other end - with the latter failing to track the forward run of Giovanni Di Lorenzo - to score with their first attack.
They then doubled their advantage before the break. Romelu Lukaku scored his 11th goal of the season after Walker played the two-time Blues striker onside.
After his mistake, the on-loan Manchester City defender kicked the ball back into the goal. However, after the first half concluded, he took his frustrations out on Felix.
As both sets of players returned to the Stadio Diego Armando Maradona dressing rooms, cameras inside the tunnel captured an exchange between the two players. Walker can be heard on the footage saying Felix's first name twice while catching up to his team-mate.
On the second occasion, he turns around as Walker instructs him to "just pass the ball" while gesticulating animatedly with his hands.
"We are not [Lionel] Messi; no one is Messi here," he continues before reiterating to pass the ball while they walk out of shot with the conversation continuing.
Felix made just a dozen passes during the first half, completing all of them, and touched the ball only 14 times. However, he would only add six more touches and the same amount of passes in ten second-half minutes before being substituted.
Abraham and Felix came off for Santiago Gimenez and Samuel Chukwueze during a double change in the 55th minute.
Head coach Sergio Conceicao had already brought Rafael Leao on for Warren Bondo at half-time, moving Felix centrally to accommodate the substitute. Christian Pulisic assumed that role with his former Chelsea team-mate off the pitch.
Milan then had a chance to halve the deficit after Bournemouth loanee Philip Billing felled Theo Hernandez inside the penalty area. Gimenez, however, had his spot-kick saved.
Conceicao would later withdraw Pulisic and Walker, with the former's replacement, Ante Rebic, pulling a goal back minutes after coming on. Napoli, though, held on to win 2-1.