The field of participants in the single competition consisted of 28 players, that of the doubles competition consisted of 16 pairs. The total prize money was $ 1,030,000; total financial liabilities were $ 1,091,000.
The qualification for the St. Petersburg Open 2015 took place on September 19th and 20th, 2015. Four qualifying places were played, which entitle them to participate in the main draw of the tournament.
At the St. Petersburg 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.