Robert Lewandowski couldn't finish the match against Celta and requested a substitution in the second half, noticing he had injured himself. Less than 24 hours later, the Polish player went to the Ciutat Esportiva, where he underwent the necessary medical tests. These confirmed that he suffers from "a semitendinosus injury in the left thigh". In the statement, FC Barcelona did not specify a recovery time, indicating that "the return to team dynamics will be decided based on his progress".
Robert Lewandowski's Injury: How Many Matches He Might Miss
With just over a month left in the season, it is not yet known exactly how many matches Lewandowski will miss. What is certain is that he won't be available against Mallorca in Montjuïc, and he also is likely to miss the Copa final against Real Madrid. Beyond that, everything is uncertain for the forward, who can't take risks.

At the moment, Barça is facing the decisive phase of the season, being alive in all competitions. Beyond those two matches, the first leg of the Champions League semifinals against Inter follows. Robert Lewandowski's intention is to try to speed up the recovery process, but he knows it will be difficult. After that, they have to visit the bottom team in LaLiga: Valladolid.
Initially, internal reports at FC Barcelona point to the visit to Milan for the return leg of the Champions League semifinals as the date for his potential return. It is not clear, but the reality is that this injury to Robert Lewandowski has come at the worst possible time: with an overloaded schedule and all competitions still at stake.
Everything at Stake for Barça
Right now, Barcelona has nine matches left to finish the season. Six in LaLiga, two in the Champions League, and one in the Copa. If they also reach the final in Europe, one more match would need to be added to the list.

Upon learning the extent of Robert Lewandowski's injury, Hansi Flick was shocked. Bad news arrives at the worst possible time, and without a clear recovery time. What the German is sure of is that he will vary between his replacements, possibly using Ferran Torres as a '9' or even Dani Olmo as a 'false 9' at certain moments.