The field of participants in the single competition consisted of 28 players, that of the doubles competition consisted of 16 pairs. The four top seeded players in the singles each received a bye in the first round.
The qualification took place on October 13 and 14, 2018. Four qualifying places were played that entitle them to participate in the main draw of the tournament. There was also a lucky loser.
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 apply to each team.
Juan Martín del Potro
Oliver Marach Mate Pavic
Stefanos Tsitsipas
Luke Bambridge Jonny O'Mara
Bradley Klahn (92)
Ernests Gulbis
Jürgen Zopp
Oscar Otte
Alexei Popyrin
Peter Polansky
M. Copil
L. Pouille
F. Verdasco
H. Chung
F. Fognini
L. Lacko
T. Daniel
