The 21-year-old was taken off during the second half of the quarter-final tie because he felt discomfort
Chelsea manager Frank Lampard is hopeful Christian Pulisic will not be kept out of action after he had to be substituted in Sunday’s 1-0 win at Leicester.
Pulisic was taken off and replaced by Ruben Loftus-Cheek midway through the second half of the FA Cup quarter-final tie.
The USA international has been decisive since the Premier League’s return this month and his recovery from injury, having scored in 2-1 victories over Aston Villa and Manchester City in the last week.
Lampard confirmed the 21-year-old suffered some discomfort, but is unsure if he will be available for the trip to West Ham on Wednesday.
“Christian felt a tightness in his calf in the second drinks break, hopefully nothing that keeps him out,” he told reporters, adding that Andreas Christensen was missing because he “had a problem with his hip [on Saturday]”.
The coach was relieved to see his side seal a place in the last four of the FA Cup, but admits their performance was not up to standard.
“The result was satisfying and getting to the semis was satisfying. We weren’t our usual selves today,” he said. “We were below what we usually produce. But I am happy with the result. We won the game and must learn from some of the mistakes in our game.
“I don’t want to sound too down after this. You have to show the grit to get a win when you don’t play well. We go on to the next one. We can park the Cup and focus on getting the league wins to be in the Champions League.”