Whether it is forehand, backhand or a slice, knowing what type of shot to play and when is key to winning tennis matches.
But so too is a player's position on the court - with the very best in the world knowing where to be to anticipate a return, or to gain a few more valuable seconds to plan their next move.
Few are better masters of this art than Carlos Alcaraz, who is proving to be one of the most complete players on the tour at the moment.
Having won the French Open in his final match of the clay season, the 22-year-old Spaniard transitioned to grass seamlessly by winning Queen's for the second time last week.