Ayden Heaven gave Manchester United Fans a fear when he was enforced with what seemed to be a dijing injury.
Ruben Amorim's side took Fiorentina on Italian side in a friendly at Old Trafford drawing 1-1 before he won 5-4 on penalties.
Heaven, 18, was stretched out on the floor and clearly in pain with 71 minutes on the clock.
Amorim was quickly replaced the young middle behind and replaced him with Matthijs de Ligt.
With just eight days until their Premier League opener against Arsenal, the knock will be a concern for the Red Devils prior to what they hope they will be a much better season.
Heaven has a history of injuries and in March of this year he had to be picked up early in the second half in a stretcher in a comfortable 3-0 win in Leicester.
Heaven was involved in a maze with Foxes striker Patson Daka and remained with an injured ankle and clearly injured.
He had to be picked up on a stretcher in caring scenes after an extensive treatment of both United and Leicester medics.
Heaven – a January – signing of Arsenal – was then seen that the king left power with his foot in a brace before he was out for two months.
Since his arrival, the talented young defender has made six competitive senior performances for United.
Heaven scored in the Tour victory in May after the season after the season against a Hong Kong XI and he came close to breaking the impasse in the scoreless draw with Leeds in Stockholm two weeks ago.
He said: “I was surprised about the number of games I played, but I knew that when I was going to play, I would have an impact.
“I just try to be calm when I have the ball and just choose the right fit.
“It helps if you have a calm mind and just play. I can play on the left in the middle, but the left is probably more to me because of my ability with the ball.
“I can drive the ball, I can overlap if I need and I can just get more forward. That is one of my biggest strengths.
“When I was younger, I was clearly an attacker, but it was when I was around 14, 15 when I had an enormous growth spurt and I started filtering a bit back.
“I started left back, then I went to the left to the center of the back, and then I started to look up to people like (Virgil) van Dijk and William Saliba, and those kinds of players.”