Ben Davies played the full 90 minutes as Wales secured a vital first-ever win over Georgia in Tblisi to set up a shoot-out against the Republic of Ireland in European qualifying Group D.
ROI beat Moldova 2-0 while Serbia lost 3-2 against Austria.
That means Serbia stay top of the group and if they slip up against Georgia in their final match, the winner of Wales-ROI at the Cardiff City Stadium on Monday night could overtake them and go straight to Russia. That looks unlikely though with Georgia yet to win a game.
It's more realistic that the winner of Wales-ROI will end up in second – in fact, Wales only need a draw to secure second – and then hope to be one of the eight best runners-up of the nine groups to enter into a play-off for a place in Russia.
Davinson Sanchez (pictured, above) faces a similar script with Colombia in South American qualifying after a heart-breaking loss against Paraguay in the early hours of Friday morning (UK time).
Colombia needed to win to book a place in the finals and looked on their way when Radamel Falcao struck 10 minutes from time. However, Paraguay hit back with goals in the 89th and 92nd minutes to snatch victory and keep their own hopes alive.
Davinson played the full 90 minutes for Colombia, who can still secure a place in the finals with a win in their final qualifier against Peru in the early hours of Wednesday morning.
That is another all or nothing game as Colombia are fourth and Peru are in fifth spot. The top four of 10 in South America go straight to Russia with the team in fifth entering a play-off. If Colombia and Peru draw, that could let in Argentina, who sit in sixth, level on points with Peru. It's all set for an incredible finale with Brazil the only team to secure a place in the finals going into the final round of matches.
Elsewhere in World Cup qualifying on Friday night, Serge Aurier played the full 90 minutes for Ivory Coast as they battled out a goalless draw in Mali – a result which leaves their hopes of reaching the finals in Russia hanging in the balance. Morocco could overtake Ivory Coast at the top of African Group C if they win their game in hand against Gabon, meaning next month's clash between the two nations could take on added meaning in the race to qualify.
Closer to home, Friday night's action was lit up by a stunning goal from on-loan midfielder Josh Onomah to set England Under-21s on the way to a 3-1 home victory over Scotland.
Starting alongside full-back Kyle Walker-Peters for the Young Lions, the ball came Josh's way 25 yards out and the Aston Villa loanee sent a dipping volley over the goalkeeper and into the top corner to give his side an early lead in the European Under-21 Championship qualifier at Middlesbrough. Josh and Kyle subsequently completed the full 90 minutes, while defender Japhet Tanganga's England Under-19s lost 1-0 in a friendly away to Czech Republic.
Here are Saturday's international fixtures...
Toby Alderweireld and Jan Vertonghen - Belgium away 2018 FIFA World Cup qualifier against Bosnia-Herzegovina - kick-off 5pm
Hugo Lloris and Moussa Sissoko - France away 2018 FIFA World Cup qualifier against Bulgaria - kick-off 7.45pm
Vincent Janssen - Netherlands away 2018 FIFA World Cup qualifier against Belarus - kick-off 7.45pm
Heung-Min Son - South Korea away friendly against Russia - kick-off 3pm
Jack Roles - Cyprus Under-19s away European Under-19 Championship qualifier against Republic of Ireland - kick-off 7pm