Paris: Lyon extended their unbeaten Ligue 1 streak to ten matches on Saturday, with a hard-fought 0-0 draw at Bastia, but wasted the opportunity to climb above Marseille into second spot.
Monaco failed to make up ground on the front-runners when they were held 2-2 at home by Caen, who have endured a turbulent week off the field.
And in the night`s other matches, Lorient eased their relegation fears with a 1-0 win over fellow-strugglers Lens, Rennes won the Brittany derby away at Guingamp by the only goal and Nice were held 0-0 at home by Reims.
Lyon`s Hubert Fournier, who has enjoyed just two victories in nine trips to Corsica as a player, looked on as the seven-time champions failed to break down the rugged home defence.
The draw also ended Lyon`s five match winning run and they next travel to arch-rivals Saint-Etienne next Sunday.
"It was a very difficult match because they pressed us high up the pitch and made it very hard to get our passing game going," said Lyon`s French midfielder Maxime Gonalons.
"It`s a good point for us and it`s never easy to come here and win but we kept our streak going and we just have to continue to pick up results," he added.
Caen`s week was marred by becoming embroiled in a match-fixing scandal dating back to their promotion season last year and saw club president Jean-Francois Fortin charged in relation to the affair.
But they went to Monaco and spiked the Principality club`s guns ahead of their Champions League game away to Bayer Leverkusen on Wednesday.
Two own goals clinched the result, with Caen`s Benin defender Emmanuel Imorou putting through his own net in the ninth minute before Fode Koita equalised six minutes after the break and a Geoffrey Kondogbia own goal gave Caen at 62nd minute lead.
But Portuguese international Joao Moutinho spared the home side`s blushes a quarter-of-an-hour from the end as he slotted home the equlaliser from close range.
On Friday, Paris Saint-Germain went top for the first time this season with a 3-2 win at mid-table Metz, as star forward Zlatan Ibrahimovic made his first start in two months.
Argentines Javier Pastore and Ezequiel Lavezzi scored either side of a Gaetan Bussman own goal for the visitors, who remain unbeaten this season.
PSG now lead Marseille by two points with Lyon one further back in third.