Southampton signed goalkeepers Gavin Bazunu from Manchester City and free agent Mateusz Lis to five-year contracts on Friday.
Bazunu, an Irish international, is expected to cost £12 million ($14.5 million).
The 20-year-old midfielder joined the Premier League champions as a 16-year-old from Shamrock Rovers, before loan spells at Rochdale and Portsmouth.
The arrival of both ‘keepers follows the announcement of the departure of Southampton’s former England goalkeeper Fraser Forster, 34, who is joining Tottenham after his contract expires at the end of June.
“We believe he has tremendous potential to improve and will give us great competition for places in the goalkeeping department,” said manager Ralph Hasenhuettl on Bazunu.
“He is a goalkeeper with a very modern style of play, comfortable in the build-up phase, who has developed physically through some very important loan moves early in his career,” he added.
Bazunu has made 10 international appearances, most notably saving Cristiano Ronaldo’s penalty in a World Cup qualifier last year.
And he is eager to make the transition to regular Premier League football.