West Ham star man Jarrod Bowen is a doubt to feature in Sunday's Premier League clash between Liverpool and West Ham.
26-year-old has been perhaps the standout performer for the Hammers in a strong start to the 2023/24 season, contributing three goals and an assist in five matches so far.
The winger has even been tipped as an eventual successor to Mohamed Salah, should the Egyptian depart for Saudi Arabia next summer.
However, Bowen was left out of West Ham's Europa League win over Backa Topola on Thursday and David Moyes has since revealed that the former Hull City star is suffering with a virus.
Speaking at West Ham's Rush Green training ground on Friday, Moyes told reporters: "Jarrod Bowen has had a virus so we'll need to see how he is. But the others, we seem okay."
West Ham won their Europa League opener 3-1 despite Bowen's absence, with new signing Mohammed Kudus among the goals.
Despite last weekend's loss to champions Manchester City, West Ham are in good form, winning three out of five Premier League fixtures to date.
Moyes' side sit sixth in the table, just three points behind Liverpool, going into the weekend.
Confidence is clearly high at the London Stadium, with striker Michail Antonio predicting that West Ham will triumph at Anfield this weekend.
"I am backing myself over Liverpool," he said on the Footballer's Football Podcast. "You know what, I think we are going to finish higher than Liverpool this season. I'm putting it out there.
"I watched the game [Wolves vs Liverpool] because it was before our game and Wolves could have run away with it! They had quite a few opportunities. We've got them this weekend and it's a six-pointer. We've got them!"
West Ham have few other availability concerns besides Bowen, while Liverpool could welcome back Trent Alexander-Arnold, who missed the last two games with a hamstring issue. Virgil van Dijk will also return to Premier League action having now served his two-match suspension.