Pogba and Martial missed the 1-0 win over FC Astana on Thursday through injury and according to manager Ole Gunnar Solskjaer the pair are unlikely to return in time to feature at the London Stadium.
West Ham United, reduced to 10 men for the final 23 minutes, held on for a goalless draw at Aston Villa in the Premier League on Monday.
The Hammers move up to eighth place with the point, while promoted Villa are now one spot above the relegation zone on four points from their opening five games.
Arthur Masuaku was sent off in the 67th minute after picking up a yellow card for a late challenge on Ahmed Elmohamady.
Villa's best chance came two minutes...
Sevilla have strengthened their attack with the addition of Javier 'Chicharito' Hernandez from West Ham on a three-year contract.
The Mexico international underwent a medical before becoming the club's 12th summer acquisition.
Sources told ESPN FC the transfer is worth €8 million.
"I want to thank West Ham for being open to negotiate and allow me to leave," Chicharito told a news conference on Monday. "It was not easy...
French forward Haller, signed from Eintracht Frankfurt in the close season, put the Hammers ahead in the 24th minute, sliding the ball home from close range after a wonderful cross from Arthur Masuaku.
The goal makes it three goals in two games for the club's...