Stoke City have signed Sampdoria forward Mehdi Leris and Serbian winger Nikola Jojic for undisclosed fees.
Leris, a 25-year-old Algeria international who made his Serie A debut as a teenager six years ago, has agreed a three-year contract.
Meanwhile, Jojic, 19, who moves from Serbian Super League side FK Mladost Lucani, joins on a four-year deal.
"I know as a young player I will have a chance to show my quality here and continue to develop my game," he said.
Jojic won his first cap for Serbia Under-21s in November, and has scored 10 goals, as well as contributing 11 assists, in 45 appearances for his hometown club in the past two years.