Ace rates among top tennis servers can vary significantly between hard courts and other surfaces, such as clay and grass. On hard courts, the combination of consistent bounce and faster surface allows servers to take advantage of their power and precision, often resulting in higher ace rates. For instance, players like Ivo Karlovic and Sam Querrey have recorded notable ace counts on hard courts due to the ideal conditions for serving. Conversely, on clay courts, the slower surface and irregular bounce tend to reduce ace rates, as the ball does not travel as quickly after bouncing, giving returners more time to react. Grass courts present a mixed scenario; while the surface is faster and can yield high ace counts similar to hard courts, the unpredictable nature of the bounce can also moderate overall ace statistics. Overall, top servers typically achieve higher ace rates on hard courts compared to other surfaces, with grass courts being a close second.