Goalkeepers are an increasingly valuable commodity in the modern game and top clubs worldwide will be on the lookout for new number ones during the 2024 summer transfer window.
Shot-stoppers like Alisson and Ederson have been transformative signings for Liverpool and Manchester City in recent times and rival teams know they are the gold standard when it comes to number ones around the continent.
So who are the best goalkeepers on the market this summer?
An understated performer in the Bundesliga for Wolfsburg since 2015, Koen Casteels has already confirmed he will leave the club at the end of the season.
The 31-year-old has earned eight caps for Belgium, including four in 2023, and the side that snares him this summer will be picking up a dependable performer.
Bayern Munich usually compete for smart signings like this and he'd be an upgrade on current deputy Sven Ulreich if the Bavarians pursued a deal.
Rangers have been rewarded for taking a punt on Jack Butland, who saw his game time drop dramatically after leaving Stoke City for Crystal Palace. He even joined Manchester United on loan for six months but never made an appearance, sitting on their bench 20 times.
He's been an inspired signing for Rangers in the Scottish Premiership, however. Butland was nominated for the PFA Scotland Player of the Year award and his form has sparked talk of a return to the England set-up.
He could be on the move this summer if a Premier League club come calling. At 31 Butland is in his peak years as a goalkeeper and will want to add to his surprisingly low tally of 87 appearances in England's top flight.
Caoimhin Kelleher may have enjoyed too much first-team football to go back to his bench role at Liverpool next season.
The Republic