Stoke have signed Hannover's former Manchester United striker Mame Biram Diouf and Banska Bystrica defender Dionatan Teixeira.
Senegal forward Diouf, 26, has agreed a four-year deal and will join on a free transfer when his Hannover contract expires on 1 July.
The Potters have paid an undisclosed fee for Slovakia under-21 centre-back Teixeira, 21, who was born in Brazil.
He managed one goal in five substitute appearances in the Premier League for United and scored three goals in 27 matches for Blackburn in the 2010-11 season.
Stoke chief executive Tony Scholes said: "Mark Hughes has wanted to sign Mame since he took over as manager last year.
"He has been a tremendous success in Germany as his record underlines and he is keen to return to England make an impact in the Premier League.
"We're pleased to be able to give him the platform to hopefully achieve that ambition."