The most distinctive part of Raonic's game is his powerful and accurate serve, from which his "Missile" nickname is derived.
He is frequently cited as having one of the best serves among his contemporaries, along with Karlović and Isner.
Some consider Raonic's serve to be among the best of all time.
Sampras, Raonic's childhood idol, describes the Canadian's serve as "bigger than big."
After a match against Raonic, Djokovic commented "I can't recall the last time I was feeling so helpless returning.
Even his second serve."
Women's tennis player Serena Williams has said that "If she could take one thing from another player, it would be Milos Raonic's serve."
Statistically, Raonic is among the strongest servers in the Open Era, winning 91% of service games to rank third all-time.
Raonic has one of the fastest recorded serves of all time.

Aided by his serve, Raonic employs an all-court style with an emphasis on short points.
His groundstrokes are both good, but his forehand is stronger than his backhand.
Because of this, he has been known to run around his backhand and hit inside-out forehands instead.
He attempts to dictate play and is generally more aggressive than his opponent, as evidenced by usually having more winners and more unforced errors.
To finish points quickly, Raonic occasionally approaches the net, with either a serve and volley or chip and charge strategy.

Raonic prefers playing on hard courts, where he has been more successful than on clay or grass courts.
All but two of the tournaments where Raonic has reached the final have been played on hard courts, and all but three of his victories over top 10 players have been on hard courts as well.

When he was twenty, the National Post described Raonic as a "hothead whose on-court demeanour was holding him back."
As he grew older, commentators came to see him as "stoic", "robotic", and "emotionless", with The Daily Telegraph referring to him as "an analytical character who questions everything he does in practice".
In 2014, Raonic explained: "I'm the son of two engineers, so everything is a numbers and calculation game."
In 2016, he added: "I am very systematic in how [I] need to go about things to bring out the best tennis for myself, and maybe that comes off as mechanical and robotic and those kind of things, but I don't know if I'd ever change that because I feel that's the way I get the best out of myself when it comes to my tennis."

Aspects of Raonic's game which have been criticized include his return of serve, quickness and mobility, backhand, short game, and the use of backspin or sidespin.
His above-average height—196 cm (6 ft 5 in)—is linked to his strong serve, but is said to limit his movement around the court.
The most distinctive part of Raonic's game is his powerful and accurate serve, from which his "Missile" nickname is derived. He is frequently cited as having one of the best serves among his contemporaries, along with Karlović and Isner. Some consider Raonic's serve to be among the best of all time. Sampras, Raonic's childhood idol, describes the Canadian's serve as "bigger than big." After a match against Raonic, Djokovic commented "I can't recall the last time I was feeling so helpless returning. Even his second serve." Women's tennis player Serena Williams has said that "If she could take one thing from another player, it would be Milos Raonic's serve." Statistically, Raonic is among the strongest servers in the Open Era, winning 91% of service games to rank third all-time. Raonic has one of the fastest recorded serves of all time.
Aided by his serve, Raonic employs an all-court style with an emphasis on short points. His groundstrokes are both good, but his forehand is stronger than his backhand. Because of this, he has been known to run around his backhand and hit inside-out forehands instead. He attempts to dictate play and is generally more aggressive than his opponent, as evidenced by usually having more winners and more unforced errors. To finish points quickly, Raonic occasionally approaches the net, with either a serve and volley or chip and charge strategy.
Raonic prefers playing on hard courts, where he has been more successful than on clay or grass courts. All but two of the tournaments where Raonic has reached the final have been played on hard courts, and all but three of his victories over top 10 players have been on hard courts as well.
When he was twenty, the National Post described Raonic as a "hothead whose on-court demeanour was holding him back." As he grew older, commentators came to see him as "stoic", "robotic", and "emotionless", with The Daily Telegraph referring to him as "an analytical character who questions everything he does in practice". In 2014, Raonic explained: "I'm the son of two engineers, so everything is a numbers and calculation game." In 2016, he added: "I am very systematic in how [I] need to go about things to bring out the best tennis for myself, and maybe that comes off as mechanical and robotic and those kind of things, but I don't know if I'd ever change that because I feel that's the way I get the best out of myself when it comes to my tennis."
Aspects of Raonic's game which have been criticized include his return of serve, quickness and mobility, backhand, short game, and the use of backspin or sidespin. His above-average height—196 cm (6 ft 5 in)—is linked to his strong serve, but is said to limit his movement around the court.
Milos Raonic