Kylian Mbappé won't feature for Real Madrid in their Champions League playoff second leg with Benfica on Wednesday as he continues to struggle with a knee problem.
The star forward has felt discomfort in his left knee in recent months -- most recently missing Madrid's LaLiga game with Real Sociedad on Feb. 14 -- and again felt discomfort in training on Tuesday.
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The club's doctors have been trying to manage the issue but, speaking ahead of the game, Madrid coach Álvaro Arbeloa told Movistar that Mbappé's absence "won't be a question of days."
"It was a consensus between everyone," he added. "First of all, him, with how he's feeling. We spoke, he and I, the doctors, and we think it's best for him to stop, recover, and come back at 100%.
"We'll see, I can't tell you right now. It won't be a question of days, it will be longer, but I can't tell you how long, let's hope it isn't too much."
Madrid won the first leg 1-0 in Lisbon on Feb. 17, with Mbappé playing the entire game.
After Wednesday's game with Benfica, Madrid host Getafe on March 2, and then visit Celta Vigo on March 7.
Mbappé has excelled for Madrid this season, scoring 23 goals in LaLiga, and 13 in the Champions League.
His left knee troubled him before Christmas. He missed Madrid's Champions League clash with Manchester City on Dec. 10, and in January, he was able to play just a few minutes of the Spanish Supercopa.
His movement appeared restricted in Saturday's 2-1 LaLiga defeat at Osasuna.
ESPN's Alex Kirkland contributed to this report.