Linda Noskova stands her ground and calmly directs a volley beyond reach for 30-0 on serve, but Raducanu responds by sending a hefty forehand down the line to stay in touch.

Noskova buries a forehand winner to let Raducanu know nothing has changed at the start of the second set, and the Czech leaps up to send another skidding off the line for 30-30.

Raducanu is able to keep her focus, securing a much needed hold as she looks to respond on Court Simonne-Mathieu.

Emma Raducanu has a real battle on her hands on her Roland Garros debut.

She's going to need two quality sets of tennis from here to get through this one.

Naomi Cavaday
BBC Sport tennis commentator

Noskova has just stolen the first set here. She was the player that lifted her level to come up with something magical.

Wow! The first set goes to 17-year-old Linda Noskova.

Emma Raducanu didn't do a whole lot wrong there, the Czech debutant just seemed to manage to raise her level when it counted.

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Brilliant again from Noskova! A forehand rattles down the line to bring up a set point...

That's a great first serve from Raducanu to keep her nose in front, but another superb backhand from Noskova is followed up by a winner at the net. 5-4 to the Czech.

An error from Noskova hands Raducanu a 3-2 lead, but the Czech slams a forehand winner to level. Tense.

Noskova draws level with a forehand, but another just misses the baseline.

A double fault from Noskova to begin the tie-break

Excellent play from Raducanu, turning defence into attack and whipping a forehand winner deep into the court for 40-15.

Noskova closes to 40-30, but Raducanu takes the Czech to a tie-break as she strikes a fine backhand down the line.

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Ooft. Long from Noskova, who had the court at her mercy as she attacks a volley - but puts too much on it. The Czech reduces the deficit to 30-15 with another superb drop shot, though.

Naomi Cavaday
BBC Sport tennis commentator

There have been some comments about the number of different injuries (for Raducanu) - but the body has to get used to playing so often.

I think she's done a great job of managing it - nothing has taken her out for months on end, as we saw with Bianca Andreescu.

Raducanu slaps into the net from the back of the court and Noskova once again moves to within a game of the set.

Pressure back on the US Open champion.

Another double fault, from Noskova this time, brings Raducanu into play, and the Czech misses at the net for 30-30.

Into the net from Noskova, and Raducanu does get the hold.

The Noskova backhand is some weapon. This latest one scorches the line and leaves Raducanu planted.

Another roar from Raducanu as she reaches 40-15, but a double fault gives Noskova hope.

And it is all over for Heather Watson - with the French crowd now cheering 'Elsa, Elsa' Watson swipes wide, and there she goes, followig Harriet Dart out in the first round.

A fantastic day for French youngsters, but not so great for the two British women.

All eyes back on Raducanu!

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Raducanu, serving to stay in the set, settles in with a couple of accurate first serves. 30-0.

A few errors from Raducanu, before another devastating backhand from Noskova completes a love hold.

The world number 184 leads for the first time - and is now a game from the opening set.