Tennis world rankings are calculated by the ATP, who award points based on a player's performance at particular tournaments. The further a player progresses in a sanctioned event, the more ...

TSN's five national feeds deliver more than 1,600 hours of world-class tennis a year, including the ATP 250 Series, World Tour 1000 and 500 series events. Get even more digital-only court feeds ...

Antitachycardia pacing (ATP) refers to the use of pacing stimulation techniques for termination of tachyarrhythmias. Such techniques can be automatically applied using implantable cardioverter ...

In addition to the Grand Slam tournaments, the ATP Tour and WTA Tour organize tournaments at different levels, including the 250, 500, and 1000 series events. These tournaments, such as the ATP 250 ...

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