Kiliann Sildillia's second-half goal helped France continue their perfect start to the Olympic Games as they booked a place in the quarter-finals with a game to spare.

Les Bleus made it two wins from two thanks to the right-back's header, though they rode their luck against a spirited Guinea side, who had two first-half goals disallowed.

Amadou Diawara forced Guillaume Restes into a superb fingertip save just minutes into the tie before Jean-Philippe Mateta wasted a hat-trick of chances to put the hosts ahead.

A cheeky backheel dribbled wide, and a thumping header missed the target on either side of Soumaila Sylla's smothering save.

Naby Keita clinically picked out the bottom corner from an offside position just before half-time, with Abdoulaye Toure also seeing a goal ruled out moments later after meeting a free-kick.

France came to life in the second half and gave a warning sign when Loic Bade struck the post from a tight angle.

In the end, Sildillia proved the difference as he was left unmarked to meet Michael Olise's cross, and Sylla could not get to his thumping header.

France are through to the next round, and top Group A with six points, while Guinea sit bottom of the group having lost both of their matches so far.

Data Debrief: Les Bleus leave it late

For much of the first half in this game, France were sluggish and could have easily gone into half-time 2-0 down if it was not for two tight offside calls. 

In the end, Thierry Henry's side showed their quality, with Olise proving the key man. He created six chances, more than anyone else on the pitch, with one of those resulting in an assist.

It is the first time France have reached the quarter-finals at the Olympics since 1996, as they looked to end a 40-year wait for a gold medal in the event.