In the singles was the defending champion Juan Mónaco , who was placed fifth this year. David Marrero and Fernando Verdasco won the doubles title last year . They also competed again this year and were placed third.
The field of participants in the single competition consisted of 48 players, that of the doubles competition consisted of 16 pairs. The 16 top seeded players each received a bye into the second round.
The qualification for the Bet-at-home Open German Tennis Championships 2013 took place on July 13th and 14th, 2013. Six qualifying places that entitle them to participate in the main draw of the tournament were played out.
At the Bet-at-home Open German Tennis Championships 2013 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.