Haris Seferovic scored a hat-trick as Switzerland recovered from conceding two early goals to beat 2018 World Cup semi-finalists Belgium 5-2 on Sunday.
The victory helped the Swiss to qualify for the last four of the UEFA Nations League in remarkable fashion.
Belgium, who suffered only their second competitive defeat since Euro 2016, threatened to overwhelm Switzerland when Thorgan Hazard scored twice in the first 17 minutes.
The first was from an awful mistake by Nico Elvedi in the second minute.
But the Swiss hit back to lead 3-2 at half time with a penalty kick from Ricardo Rodriguez and a brace from Seferovic.
Elvedi then atoned for his mistake by heading them further in front in the 62nd minute, and then Seferovic added a fifth.
The two sides finished level at the top of Group Two in League A — the top tier — with nine points.
But the Swiss qualified on having the better head-to-head record after Belgium’s 2-1 win in Brussels.
“I’m very proud of these young players,” said Switzerland coach Vladimir Petkovic. “After the second goal, we had to stay calm and not concede a third goal and try to get slowly back into the game.”
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Needing to win 1-0, 2-1 or otherwise by a two-goal margin, the Swiss made a terrible start to Petkovic’s 50th match in charge.
They were beaten 0-1 at home by Qatar in a friendly on Wednesday, and terrible thoughts could have started dropping in.
A harmless Belgian pass into the area landed at the feet of Elvedi who carelessly deflected it into the path of Hazard and he dinked the ball over Yann Sommer.
In spite of missing several key players, including Romelu Lukaku and Kevin de Bruyne, Belgium quickly increased their lead.
Hazard, playing alongside older brother Eden, collected a pass in midfield, advanced as Elvedi and Rodriguez backed off and fired a low shot past Sommer from the edge of the area.
The contest appeared to be over.
But Switzerland were handed a lifeline in the 26th minute when Kevin Mbabu went down in a congested goal-line scramble and Rodriguez converted from the penalty kick spot.
That completely changed the complexion of the game and five minutes later, Rodriguez lofted a high ball into the area towards Xherdan Shaqiri.
The Liverpool player cushioned a header into the path of Seferovic to score from close range.
Incredibly, the Swiss went ahead one minute before the break with a goal that started with a Belgian corner kick they cleared away.
The Swiss broke and found Edimilson Fernandes on the right where he pulled the ball back into the area for Seferovic to sweep the ball past Belgium goalkeeper Thibaut Courtois.
The hosts still needed a another goal and it arrived in the 62nd minute as Shaqiri, who had an outstanding match, curled a low cross into the area.
Elvedi made amends for his earlier howler with a glancing header.
An unmarked Seferovic sealed the win by heading in Mbabu’s cross with six minutes left.
“We suddenly started to lose duels and gave away a stupid penalty kick foul. And suddenly the Swiss got hope for more,” said Courtois.
“The feeling went into our team, that this cannot go wrong. But this is a high-level competitive match and hopefully not reaching the final four will teach us a lesson for the future.”