Draws consist of 28, 32, or 48 for singles and 16 for doubles.
In 2025, the series includes only 30 tournaments after retirement of five tournaments (Atlanta, Cordoba, Estoril, Lyon, Newport)[1] and upgrades of three tournaments to the 500 level (Dallas, Doha, Munich).
[2] Thomas Muster holds the record for most singles titles at 26, while Mike Bryan holds the record for most doubles titles won with 46.
[4] ^ Parma downgraded to Challenger 125 in 2022, Newport in 2025.
Groth Active players indicated in bold.