Damien Perquis scored his first international goal Saturday to give Poland a 1-0 win over Slovakia in the co-host's second warmup match before the European championship.
The Sochaux defender's header from a cross by Lukasz Piszczek found the net after half an hour, earning Poland a second straight 1-0 victory after its win over Latvia on Tuesday.
Poland coach Franciszek Smuda made seven changes to the side, most notably to include Dortmund trio Lukas Piszczek, Jakub Blaszczykowski and Robert Lewandowski.
Midfielder Maciej Rybus failed to double the score just before halftime when his shot hit the post after a pass by Rafal Murawski.
Poland missed fluency and lacked attacking power in the second half after Smuda substituted six players.
Poland plays Andorra in a friendly on June 2 in Warsaw before opening Euro 2012 against Greece in the same stadium six days later.
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