Table 1.
OBSTENNIS observation instrument.
Fig 1.
Court zones.
Table 2.
Description of the performance variables of the matches on the different court surfaces in the 2021 season and comparative analysis between court surfaces (χ2 inter-variable).
Fig 2.
Probability of winning the point on each surface as a function of type of service and rally length.
Fig 3.
Point ending with first service.
Fig 4.
Point ending with second service.