Two former multiple winners of the event missed the race for injury.
Four time winner Tom Boonen was ruled out after dislocating his shoulder in a crash during Paris-Nice in March, whilst three-time winner Fabian Cancellara missed out after fracturing two vertebrae in his lower back in a crash at E3 Harelbeke.

Alexander Kristoff (Team Katusha) was tipped by as the favourite to win the race, having won three stages and the General Classification of the Three Days of De Panne, the Tour of Flanders and Scheldeprijs in the fortnight leading up to the race.
Defending champion Niki Terpstra also showed good form, having been runner up to Kristoff in the Tour of Flanders and also placing second in Gent–Wevelgem a week earlier.
He was likely to share leadership of Etixx-Quick Step with Zdeněk Štybar, who was also in good form with a victory at Strade Bianche and second place at E3 Harelbeke earlier in the classics campaign.

Former Tour de France winner Bradley Wiggins was riding the event as his final race for Team Sky before moving to his new WIGGINS squad to begin his preparations for a return to track racing at the 2016 Summer Olympics.
He was expected to share leadership of Sky with Geraint Thomas, winner of E3 Harelbeke, and Ian Stannard, winner of Omloop Het Nieuwsblad.
Other likely contenders for victory included Sep Vanmarcke (Team LottoNL-Jumbo), the runner up in the 2013 edition of the race, John Degenkolb (Team Giant-Alpecin), the runner up of the 2014 edition, Lars Boom (Astana Pro Team) who won Stage 5 of the 2014 Tour de France which featured some of the Paris-Roubaix cobble sectors, Greg Van Avermaet (BMC Racing Team) and Peter Sagan (Tinkoff-Saxo).
Two former multiple winners of the event missed the race for injury. Four time winner Tom Boonen was ruled out after dislocating his shoulder in a crash during Paris-Nice in March, whilst three-time winner Fabian Cancellara missed out after fracturing two vertebrae in his lower back in a crash at E3 Harelbeke.
Alexander Kristoff (Team Katusha) was tipped by as the favourite to win the race, having won three stages and the General Classification of the Three Days of De Panne, the Tour of Flanders and Scheldeprijs in the fortnight leading up to the race. Defending champion Niki Terpstra also showed good form, having been runner up to Kristoff in the Tour of Flanders and also placing second in Gent–Wevelgem a week earlier. He was likely to share leadership of Etixx-Quick Step with Zdeněk Štybar, who was also in good form with a victory at Strade Bianche and second place at E3 Harelbeke earlier in the classics campaign.
Former Tour de France winner Bradley Wiggins was riding the event as his final race for Team Sky before moving to his new WIGGINS squad to begin his preparations for a return to track racing at the 2016 Summer Olympics. He was expected to share leadership of Sky with Geraint Thomas, winner of E3 Harelbeke, and Ian Stannard, winner of Omloop Het Nieuwsblad. Other likely contenders for victory included Sep Vanmarcke (Team LottoNL-Jumbo), the runner up in the 2013 edition of the race, John Degenkolb (Team Giant-Alpecin), the runner up of the 2014 edition, Lars Boom (Astana Pro Team) who won Stage 5 of the 2014 Tour de France which featured some of the Paris-Roubaix cobble sectors, Greg Van Avermaet (BMC Racing Team) and Peter Sagan (Tinkoff-Saxo).
2015 Paris–Roubaix