Ernests Gulbis, who beat Roger Federer in the previous round, takes the first set with a single break of serve in his quarter-final against sixth seed Tomas Berdych on Suzanne Lenglen.

Levi Gould:, external Can see Raonic holding onto his serve, but he'll have to produce something special to break through Djokovic.

Djokovic's average serve is around 18mph slower than that of Raonic and as a result isn't getting as many free points. The Serb adds a little pace to his second serve to dictate the point and bring up 15-15. He then wins three of the next four, with a cheeky drop shot from the back of the court thrown in, to take the game.

Chris Lewis:, external Raonic's serve is faster than my car's top speed! Crazy stuff.

Raonic moves to game point with his fifth ace of the match but then gets greedy and pulls a forehand down the line wide by a foot. Another forehand error follows and suddenly he's facing a break - and set point - against him. He saves the first, brings up game point with a sixth ace and then takes the game as Djokovic nets.

Raonic really goes after Djokovic's second serve, but the Canadian has limited success. Still, at least he's going for his shots and that will be at the back of Djokovic's mind. The number two seed holds his serve to love. Raonic to serve to stay in the set.

Carol: Both women and men's 18th seeds in action on Lenglen. Winning day for number eighteens?

Djokovic is struggling to get a hold of the Raonic serve and as a result, the Canadian is winning plenty of cheap points. Another service game breezes by to 30.

It's Djokovic's turn to face a break point, but he intriguingly chooses to take a lot of speed off his first serve, the ball reaching just 80mph, and that seems to throw Raonic off his game and we're soon at deuce. Djokovic dictates the next two points to hold serve.

Image source, AFP

Djokovic sniffs a chance when he conjures up his first break point of the match, but Raonic throws in a big forehand winner to force deuce and then rattles off the next two points to pull back level.

John McEnerney:, external Can see Raonic making Djokovic work hard in the first two sets, but Djokovic to win in four and continue his march to the final.

Raonic pulls out a a backhand volley from the very top drawer as he closes to 40-30, but Djokovic hammers an ace in the next to hold serve once more.

A first double-fault of the match from Raonic brings up deuce, but he then hits an ace and takes the game as Djokovic goes long. The Canadian has won 89% of points when he gets his first serve in.

It's another easy service hold for Djokovic, who doesn't have the pace of Raonic but good placement, followed by heavy, deep hitting is enough to cruise through the game for the loss of just a point.

Big-serving Raonic gets his serve motoring from the off, the Canadian firing down serves in access of 130mph to race to 40-15 before closing the game out with an ace.

Novak Djokovic gets off to a solid start, holding his opening service game to 30.

Russell Fuller
BBC tennis correspondent on BBC Radio 5 live sports extra

Image source, AFP

"That was a phenomenal match and a phenomenal comeback by Bouchard. She looks a much more aggressive player than she was in Melbourne, and when Suarez Navarro was trying to dictate, Bouchard's defence was also very impressive. She's playing well enough to beat Sharapova - but can she do it on a Grand Slam semi-final stage?"

Over on Suzanne Lenglen, sixth seed Tomas Berdych takes on Ernests Gulbis, the 18th seed, in the men's quarter-finals.

What a day it could be for Canada if Milos Raonic pulls off a shock win over Novak Djokovic to follow compatriot Eugenie Bouchard into the semi-finals. Raonic and Djokovic are out on court and warming up.

Away from the French Open, there has been an early defeat for Britain's Kyle Edmund in the Aegon Trophy in Nottingham. Edmund lost 4-6 6-2 6-2 to eighth seed Dudi Sela.