Defending champion in singles was Stan Wawrinka . The defending champions Bob and Mike Bryan were in doubles .
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 got a bye into the second round.
The qualification for the Monte-Carlo Rolex Masters 2015 took place on April 11th and 12th, 2015. Seven qualifying places were played, which entitle them to participate in the main draw of the tournament. There were also two lucky losers.
At the Monte-Carlo Rolex Masters 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 will receive 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 apply per player.