Defending champion Kei Nishikori successfully defended his title, defeating Pablo Andújar in the final, 6–4, 6–4, to win the singles title at the 2015 Barcelona Open.
Seeds All seeds receive a bye into the second round.
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
Qualifying
Seeds
Qualifiers
Lucky losers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
References Main Draw Qualifying Draw