Andres Iniesta was forced off against Atletico Madrid due to injury
Barcelona could be without Andres Iniesta for the second leg of their Champions League last-16 clash against Chelsea after he suffered a hamstring injury.
Barcelona confirmed their key midfielder sustained the injury in his right leg during the first half of Sunday's 1-0 La Liga win over Atletico Madrid.
Iniesta tried to continue after feeling the problem around the 20-minute mark, but he was eventually replaced by Andre Gomes after 34 minutes.
Barcelona host Chelsea on March 14 in the second leg of their last-16 clash, having drawn the first game at Stamford Bridge 1-1 last month.
Watch highlights of the match between Barcelona and Atletico Madrid
Coach Ernesto Valverde told the club website: "Without Iniesta we lose a unique player, irreplaceable.
"It's difficult to find a substitute for him because there is no-one like him in the world. Let's hope the injury is nothing serious."
Lionel Messi's 600th career goal sank Atletico and ensured Barcelona stretched their lead at the top of the table to eight points.
The Argentinian struck with a trademark free-kick as Barcelona edged past their nearest rivals to take a huge stride towards regaining the title.