Wales warmed up for their decisive World Cup qualifying play-off this weekend by losing 2-1 with a second-string team in Poland in the UEFA Nations League on Wednesday.
Robert Page's side will face the winner of the play-off semi-final between Ukraine and Scotland in Cardiff on Sunday to decide who takes the last European qualifying spot at this year's World Cup in Qatar, and their key players were rested for the match in Wroclaw as a result.
Jonny Williams of Swindon Town put Wales in front early in the second half in the Nations League A, Group 4 match, but a Poland side captained by Robert Lewandowski fought back to take the three points.
Two substitutes got their goals, with youngster Jakub Kaminski -- who will move to German Bundesliga side Wolfsburg for next season from Lech Poznan -- equalising in the 72nd minute.
Fellow substitute Karol Swiderski, who plays his club football in MLS, then struck Poland's winner five minutes from time.
Belgium and the Netherlands complete Group 4 and those two sides will meet in Brussels on Friday.
After their play-off, Wales are due to host Belgium on June 8 and the Netherlands three days later.
The action continues on Thursday when Spain host Portugal in Seville in the standout game.