Lazio president Claudio Lotito has assured fans they will make more new signings.
Felipe Anderson, Elseid Hysaj, Dimitrije Kamenovic and 16-year-old Luka Romero have already arrived this summer.
In an editorial, Lotito wrote for Lazio Style Magazine: “This club and this presidency have written together, with the contribution of footballers, coaches, all fans, many surprising pages of Lazio's history.
“Some new signings have already arrived and are training with the group and more will arrive to improve a team that many clubs envy."