Wales's hopes of qualifying for Euro 2020 suffered a setback after they were beaten 1-0 by Group E leaders Hungary in Budapest on Tuesday.
Mate Patkai raced onto Adam Szalai's lay-off to drill the winner home with 10 minutes left. They lead the group with nine points from four games, three ahead of second-placed Slovakia.
Ryan Giggs's side, beaten 2-1 by Croatia on Saturday, saw their best chance fall to Gareth Bale in the second half but the Real Madrid striker produced a tame finish that failed to trouble goalkeeper Peter Gulacsi.
The Euro 2016 semifinalists are fourth with three points from three games, six points behind the Hungarians.