Dominic Thiem will seek the advice of a specialist in Barcelona after suffering an injury scare ahead of Wimbledon next week.
Number two seed Thiem retired due to a wrist injury when 5-2 up in the opening set against Adrian Mannarino in the Mallorca Championships on Tuesday.
An MRI conducted at a Mallorca hospital was inconclusive, so the US Open champion will now undergo further tests.
In an update on Wednesday, Thiem wrote on social media: "Yesterday during the match I had a problem with my wrist.
"I went immediately to do an MRI at the hospital in Palma de Mallorca. The results weren't that clear and I have decided to go to Barcelona to check with a specialist.
"I hope I can get the results and a clear diagnosis in the next days."
The ATP 250 event continued without him in Mallorca, as Roberto Bautista Agut moved into the quarter-finals with a 6-3 7-5 triumph over Italian Stefano Travaglia.
More Spanish success on home soil arrived as Pablo Carreno Busta won 6-4 6-4 against Jiri Vesely.
In the doubles, Novak Djokovic and Carlos Gomez-Herrera saw off top seeds Marcel Granollers and Horacio Zeballos to reach the last four in that competition.
Djokovic appears to be enjoying himself as he continues to prepare for Wimbledon, saying: "This was a huge win for us, beating one of the best doubles players in the world after losing the first set.
"We are having a lot of fun on the court. I thought we played well even though we lost the first set."
There was a major upset at the Viking International in Eastbourne, meanwhile, with number one seed Gael Monfils suffering a shock last-16 defeat to Australia's Max Purcell – ranked number 283 in the world.
Purcell, who is only in the tournament as a lucky loser, claimed a huge 6-4 5-7 6-4 win in a battle lasting over two hours.
Monfils fired down 16 aces and fought back after being within two points of defeat in the second set but was ultimately beaten and has not made an ATP quarter-final since February 2020.
"It feels unbelievable," said Purcell. "I thought I'd come out and have a go.
"I've struggled to get into any singles events over the past nine months and primarily played doubles, so to get on a run here, on my favourite surface, is great."
Purcell will take on Andreas Seppi – a comfortable winner over Emil Ruusuvuori – in the last eight.
While Monfils crashed out, there was less drama for the second and third seeds.
Alex de Minaur won 6-3 6-4 against home hope Liam Broady, while Lorenzo Sonego was a 6-4 6-2 victor in his contest with John Millman.