Captain Georginio Wijnaldum scored a late winner as the Netherlands rallied from a goal down to beat Poland 2-1 in Nations League A Group 1.
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Italy overcame the absence of 20 players and coach Roberto Mancini due to injury or COVID-19 related issues to beat lacklustre Poland 2-0 on Sunday.
Italy forward Federico Chiesa was guilty of a glaring miss early in the game as his side played out a disappointing 0-0 draw away to Poland.
Netherlands forward Steven Bergwijn scored just past the hour mark to secure a hard-fought 1-0 win over Poland in their Nations League clash.
Poland left it late before goals from substitutes Przemyslaw Frankowski and Arkadiusz Milik gave them a 2-0 win over North Macedonia.
Poland were held to a 0-0 draw in a top-of-the-table clash with Austria in their Euro 2020 qualifier on Monday as their lead in Group G was cut.
Slovenia ended Poland's 100 percent record in the Euro 2020 qualifiers when goals from Aljaz Struna and Andraz Sporar gave them a shock 2-0 win.
Poland beat North Macedonia 1-0 away on Friday to remain top of Euro 2020 qualifying Group G with their third win in three games.
Poland made it two wins out of two at the start of their Euro 2020 qualifying campaign with a 2-0 win against Latvia.
Poland forward Krzysztof Piatek continued his prolific season by scoring off the bench in a win at Austria.
Poland forward Arkadiusz Milik scored from a twice-taken penalty to give his already-relegated side a 1-1 draw in Portugal.
Portugal's Bernardo Silva scored a fine individual goal as their new-look side recovered to win 3-2 away to Poland in the UEFA Nations League.
Italy scored a last-gasp goal to beat Poland 1-0 in the UEFA Nations League on Sunday night to relegate the hosts from the top tier.
UEFA has charged Poland with fan racism in a Nations League game, while the Czech Republic and Ukraine face charges for crowd unrest.