Gylfi's Iceland held on for a goalless draw against Croatia despite having to play with 10 men for 40 minutes of the play-off, first leg in Reykjavic.
Gylfi was at the heart of everything for Iceland as they just edged the first half, including an early strike at goal blocked by former Spur, Vedran Corluka.
However, Olafur Skulason was sent off five minutes into the second half for a professional foul and Croatia took control after that, forcing Iceland goalkeeper Hannes Thor Halldorsson into a few saves.
Gylfi completed the 90 minutes and the teams meet again for the second leg in Zagreb on Tuesday.
Hugo started for France in Kiev and had little to do until the game exploded into life just after the hour.
Roman Zozulya opened the scoring for the home side from close range, although Hugo almost clawed the ball out from six yards.
France's task was made harder when Laurent Koscielny upended Zozulya for a penalty in the 83rd minute and Andriy Yarmolenko fired home the spot-kick off the underside of the crossbar.
The teams meet again in Paris for the second leg on Tuesday.
Vlad Chiriches was ruled out of Romania's first leg against Greece after picking up a nose injury against Newcastle on Sunday.
The central defender and skipper was clearly missed as Romania suffered a 3-1 defeat at the Karaiskakis Stadium, home of Olympiacos in Athens.
The return leg is in Bucharest on Tuesday.