There's a number of out-of-contract stars looking to be snapped up before the season gets into its full stride, who could prove to be bargain signings. Here's a look at some of the best free agents who Sheffield United and their Premier League rivals could look to snap up in the near future.
5. Mario Mandzukic
The 34-year-old is likely to demand a hefty wage, but his experience could prove invaluable. The 2018 World Cup finalist has won league titles with Bayern Munich and Juventus in the past. Photo: ISABELLA BONOTTO
6. Nathaniel Clyne
Before England's glut of quality right-backs emerged, Clyne was hotly tipped to be a regular starter for years to come. The 29-year-old is looking to make a comeback following a cruciate injury last summer. Photo: Warren Little
7. Steven Defour
The 32-year-old is another experienced player who could be a fine rotation option. He's won league titles in his native Belgium before, and picked up over 50 caps before retiring from international football. Photo: JASPER JACOBS
8. Samir Nasri
He's just been released by Anderlecht, and is looking for a new club. He looks likely to join a side in Turkey, but stranger things have happened... Photo: Dean Mouhtaropoulos