U.S. men's national team star Christian Pulisic suffered an injury in warmups ahead of Chelsea's match against Burnley on Saturday.
After the Blues' 3–0 win, coach Frank Lampard said Pulisic had a small sensation in his hamstring, which resulted in him being pulled from the game. Timo Werner replaced Pulisic in the lineup.
Lampard added that the winger is "frustrated" and will need a scan.
A video of the warmup that circulated on social media showed Pulisic appeared to slip and then walk off the pitch upset.
Chelsea traveled to Turf Moor one year after Pulisic scored a perfect hat trick in the Blues' 4–2 victory over Burnley last year.
The 22-year-old recently returned from a hamstring injury and didn't start in Chelsea's Champions League match against Krasnodar on Wednesday. However, Pulisic came off the bench to draw a penalty and score the final goal of a 4–0 rout of Krasnodar. It marked his first goal of the season and tied DaMarcus Beasley's record for an American in the Champions League with his fourth career goal in the competition with his 90th-minute finish.
Pulisic, who has missed 10 games this season, will likely hope to return to the field with USMNT for a camp starting on Nov. 9. The camp will include a Nov. 12 friendly against Wales at Liberty Stadium in Swansea without fans in attendance.