BBC journalist Simon Stone has shared his view as Leeds United signing Luis Sinisterra picked up an injury in the Whites' pre-season friendly with Crystal Palace.

The Lowdown: Sinisterra joins Whites

The winger completed a move from Feyenoord to Leeds earlier this month, helping fill the void left by Raphinha, who has joined Barcelona in a big-money transfer.

Sinisterra is an exciting signing, having scored 12 goals and chipped in with seven assists in the Eredivisie last season, and fans have been enjoying watching him in pre-season action.

Unfortunately, things have taken a negative turn in that respect.

The Latest: Injury update

Taking to Twitter during Leeds' friendly clash with Palace, Stone confirmed that Sinisterra had limped off after picking up an injury, which he believes to be a hamstring issue.

The reporter confirmed it was a non-contact injury and shared a brief moment involving manager Jesse Marsch before the player headed down the tunnel.

"Sinisterra went down with no-one near him. Looked like a hamstring injury. Had a brief word with Jesse Marsch before making his way slowly to the tunnel. Colombian one of LUFC's big summer signings."

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The Verdict: Big concern for Marsch

A new signing getting injured is always hugely disappointing and this is especially concerning, given the manner in which Sinisterra picked up the knock.

Nobody was around him when the incident happened, which can mean potential muscle or even ligament damage due to an awkward turn or landing, which will be of big concern for Marsch.

The hope is that Sinisterra's setback is nothing serious and that he left the field as a precaution, but with the new Premier League season only two weeks away, anyone associated with Leeds will be sweating.