Two-time Grand Slam finalist Stefanos Tsitsipas says playing ATP Masters 1,000 events over two weeks has been a "backwards move", as the debate over scheduling and player welfare continues.

Hydrolases are enzymes that catalyze the cleavage of a covalent bond using water. Types of hydrolase include esterases, such as phosphatases, that act on ester bonds, and proteases or peptidases ...