Bundesliga club RB Leipzig on Friday confirmed that Spain midfielder Dani Olmo has a thigh injury which is set to see him miss the Nations League semi-final against Italy.
Leipzig coach Jesse Marsch said Olmo, 23, has a "minor muscle fibre tear" which will sideline him for weeks, including for Saturday's Bundesliga game Hertha Berlin, as well as Tuesday's Champions League home match against Club Brugge.
"It's not good, but it's not that bad either," the American said of Olmo's injury.
The attacking midfielder is poised to miss Spain's Nations League semi-final against Italy on October 6.
Olmo had already sat out Leipzig's first three league games this season after playing for Spain at the Tokyo Olympics where they lost the men's final 2-1 to Brazil.
Marsch is under pressure to get a victory after three defeats and a draw from their five Bundesliga games this season, as well as a 6-3 thrashing at Manchester City in the Champions League.
"For sure this week is an important week," said Marsch, whose side has three home games in a row against Hertha, Brugge and Bochum.
"Three times at home is important. Our focus is 100 percent on Hertha. The most important thing is to get results. There is no panic in the group."
Marsch said last Sunday's 1-1 draw at Cologne was a "step in the right direction", adding: "We're in the phase now where a few results will do us good."