A key academic paper on this topic is by researchers from the University of Vienna and University of Munich.

: Players typically win significantly fewer points on their first serve during break points ( ) compared to regular points (

: Under the pressure of a potential break, players often hit their first serves faster but decelerate their second serves to avoid double faults.

: A study in Frontiers in Psychology explores the "return of serve" as a qualitative framework, detailing how elite players use kinematic (body movement) and contextual information to break an opponent's serve.

: Research published in Journal of Sports Science & Medicine notes that while first-serve effectiveness varies by surface ( on clay vs.

: A critical difference between winning and losing players is their success rate on second serves . Winning players are often able to maintain or even improve their point-win percentage on second serves during break points, while losing players cannot maintain their level.