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 ...

ATP (adenosine triphosphate) is the energy-carrying molecule used in cells because it can release energy very quickly. Energy is released from ATP when the end phosphate is removed. Once ATP has ...

Novak Djokovic’s wait for a 100th career ATP Tour title continues after his competitive return was cut short with a shock first-round exit at the Qatar ExxonMobil Open. Djokovic, making his ...

Joao Fonseca is the youngest Brazilian to win an ATP Tour singles title Teenager Joao Fonseca underlined why he is one of tennis' most promising stars as he beat Francisco Cerundolo to claim his ...