Monaco's 100 per cent start to the season came to a disappointing end when Claudio Ranieri's men were held to a 0-0 draw at home to Toulouse.
The hosts were forced to play the game behind closed doors after last season's match against Le Mans was marred by crowd trouble and the hosts struggled to break down Le Tefece in an empty Stade Louis II.
Monaco began the game well and last week's hat-trick hero Emannuel Riviere could have had a brace in the opening 20 minutes.
They continued to press and Yannick Ferreira-Carrasco should have scored when Ahamada parried a cross into his path, but the Belgian fired over the bar from close range.
Radamel Falcao fired a free-kick straight at Ahamada before Jeremy Toulalan was unlucky to see a 30-yard rocket cannon back off the crossbar.
Toulouse's Serge Aurier had a chance to win it deep into stoppage time but Danijel Subasic saved bravely at his feet.