Two men have reached the third round without losing serve: Roger Federer and Milos Raonic.
Federer has reached the final at Wimbledon for the last two years, dropping serve just once in each year. Raonic leads the ATP Tour in 2016, holding 90% of his service games. These are two very dangerous servers who look to be serving notice to the rest of the field.
Check SI.com's Wimbledon 2016 Daily Data Viz hub page throughout the whole tournament for the latest data-driven infographics and charts from IBM, the official technology partner for Wimbledon. IBM captures and analyzes the data that powers all of the Grand Slams, as well as the digital platforms that extend the experience to fans around the world.