The field of participants in the single competition consisted of 56 players, that of the doubles competition consisted of 24 pairs. The eight top seeded players in singles or pairings in doubles each received a bye into the second round.
Qualification for the Mutua Madrid Open 2015 took place on May 2nd and 3rd, 2015. From 28 participants, seven qualifying places were played, which entitle them to participate in the main draw of the tournament.
At the Mutua Madrid Open 2015, the following prize money and world ranking points were paid out or credited for reaching the respective round. Players who entered the main field from qualification received the specified qualification points in addition to those for reaching the respective round. Otherwise the amounts are not to be understood as cumulative. The amounts for the double competition were per player.