The 22-year-old defender has been condemned by a number of Liverpool players for his dangerous tackle in Boston
Sunday’s friendly in Boston – won 2-1 by Sevilla – was marred by Gnagnon wildly kicking out at 18-year-old Liverpool left-back Larouci.
Sevilla defender and second-half substitute Gnagnon, who issued an apology post-game, was shown a straight red card with 14 minutes remaining, while Larouci required lengthy treatment at Fenway Park.
“[Gnagnon] was very, very worried and knows it could have been a bad injury,” Lopetegui said.
“I am worried about the player [Larouci] but I asked Jurgen [Klopp] and he said the player is okay, it isn’t a bad injury and I am happy for that.
“That’s the most important thing. The referee thought it was a red card and I haven’t seen a replay but it’s possible it was a red card.”
Larouci reportedly left the stadium on crutches following a fiercely contested pre-season fixture, with Liverpool on the receiving end of some tough tackles.
Liverpool star Virgil van Dijk was infuriated by Gnagnon’s actions and said the tackle “says something about” the Sevilla defender.
James Milner was also among those to hit out at the challenge, labeling it disgraceful.
Klopp’s side then face Manchester City in the Community Shield on August 4, although it has been confirmed Sadio Mane will not return for that outing as he enjoys an extended break after the Africa Cup of Nations.
Liverpool could look to lay a marker down at Wembley as they bid to end City’s two-year hold over the English top flight.
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The Manchester club took the title by just one point last season, leaving Liverpool short of a first ever Premier League title despite amassing an impressive 97 points.
Klopp’s players did go on to lift the Champions League though, winning a stale final 2-0 against Tottenham in Madrid after completing an incredible semi-final comeback against Barcelona at Anfield having trailed 3-0 from the first leg.