Guingamp boosted their qualification hopes in Europa League Group K with a 2-0 win over Dinamo Minsk.
Claudio Beauvue gave the French side the lead just before half-time and Jonas Lossl saved Igor Stasevich's penalty to preserve a third straight European clean sheet.
Christophe Mandanne then scored a late clincher to take his side three points clear of PAOK Salonika in second place behind Fiorentina, after those two teams drew 1-1 in Florence.
Guingamp's Lionel Mathis fired wide with the only effort on goal in an opening 25-minute period which saw both teams fail to convert set-piece opportunities into clear sights of goal.
Baissama Sankoh, with a 30-yard blast, and Beauvue both missed the target as the hosts tried to assert their authority on the first half.
Dinamo's first chance came from a 30-yard free-kick, following Laurent Dos Santos' foul on Chigozie Udoji, but Dmitry Molosh's powerful strike was saved by Lossl and it proved merely to be the prelude to a Guingamp opener.
Mandanne looked set to put his side in front and, although he was brilliantly denied by defender Sergei Politevich, Beauvue was following up and stretched to steer the ball in from 12 yards.
He threatened another in first-half stoppage time, but his header from Sylvain Marveaux's free-kick went wide.
Stasevich was one of two half-time substitutes for Dinamo as he and Yaroslav Yarotsky replaced Franck Dja Djedje and Igor Voronkov.
It was the midfielder's 50th game in Europe, as well as his team's 100th, and he was given the chance to mark the occasion with a goal when Christophe Kerbrat fouled Adama Diomande in the box, but his spot-kick was saved by Lossl diving low to his left.
Mandanne forced a good save from Aleksandr Gutor and Beauvue headed wide before the former had the best chance yet to kill the game off.
Sambou Yatabare's free-kick picked out Mandanne in the box, but his shot hit a post and bounced away to safety.
He was not to be denied, though, and with four minutes remaining he met Beauvue's right-wing cross with a neat right-foot finish into the top corner to give Gutor no chance.
Fiorentina are next up for Guingamp, at home in three weeks' time, but the trip to PAOK a fortnight later is likely to be the decisive game in settling the qualification picture.
ends
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