* Baysse dents Marseille's Champions League hopes
* Diarra anger over penalty claim (Adds details, quotes)
Olympique Marseille's hopes of playing in next season's Champions League suffered a blow when their 16-match unbeaten run came to an end in a 1-0 defeat at Stade Brest on Sunday.
Paul Baysse scored the only goal in the 17th minute as Marseille, who are seventh in Ligue 1, lost for the first time in all competitions in three months.
Didier Deschamps's team has 39 points from 24 games, six points behind third-placed Lille, who occupy the Champions League qualifying spot. Lille travel to Stade Rennes later on Sunday (2000 GMT).
Toulouse moved up to sixth place on 40 points from 25 games after goals by Aymen Abdennour and Emmanuel Riviere gave them a 2-0 win over bottom club Sochaux.
At Brest's Francis Le Ble stadium, Marseille, who beat Inter Milan 1-0 in a Champions League last-16 first leg on Wednesday, dominated throughout, but Brest's keeper, Steeve Elana, had a fine day.
The visitors were denied a penalty in the first minute when Johan Martial, who later admitted on French TV he committed a foul, brought down Brandao in the box.
Brazilian striker Brandao then directed a header against the post.
Elana made two stunning saves to deny Fanni and Benoit Cheyrou from close range in the second half before tipping an Andre Ayew effort over the bar in injury time.
Shortly afterwards, Eden Ben Basat cleared a Fanni header off his goalline.
"We were denied an obvious penalty after 30 seconds of play. It was a big mistake from the referee," Marseille captain Alou Diarra told French TV channel Foot +.
"If we get and score that penalty in the first minute, the game is just not the same."