Croatia got off to a winning start for the first time at a World Cup since 1998 with a comfortable victory over Nigeria. An own goal from Nigeria's Oghenekaro Etebo and a Luka Modric penalty did the damage, but Nigeria did actually finish the match having had more attempts than their opponents.
The win in Kaliningrad put Croatia in a strong position after Argentina were held to a surprise 1-1 draw by Iceland in their Group D opener.
IMAGE: Croatia's Mario Mandzukic and Andrej Kramaric celebrate after Nigeria's Oghenekaro Etebo an own goal. Photograph: Fabrizio Bensch/Reuters
By far and away Croatia's best performance at this World Cup came against two-time champions Argentina, who were blown away by Zlatko Dalic's side.
Goals from Ante Rebic, a thunderbolt from Modric and a late Ivan Rakitic goal gave Croatia a first victory over a South American opponent in World Cup history, and inflicted the heaviest World Cup first-round defeat since 1958 on a beleaguered Argentina.
The victory meant Croatia sealed progression to the last 16 with a game to spare. "People will realise they should respect Croatia," defender Dejan Lovren said after the game. "If we are like today, through all the tournament, I believe we can go far."
IMAGE: Ante Rebic of Croatia celebrates after scoring his team's first goal against Argentina. Photograph: Clive Brunskill/Getty Images
Despite making nine changes with their progression already secured, Croatia racked up three World Cup group victories for the first time with a narrow win over Iceland, scoring with both of their shots on target.
Milan Badelj gave the Croatians the lead in the second half but his goal was cancelled out by Iceland's Gylfi Sigurdsson, who scored a penalty. Substitute Ivan Perisic hit the winning goal in the 90th minute, to ensure than Croatia topped Group D by a colossal five points.
IMAGE: Milan Badelj scores for Croatia in the World Cup Group D match against Iceland. Photograph: Grigory Dukor/Reuters
This was no classic. After two very quick-fire goals - only the second match in World Cup history where both teams scored inside four minutes - extra time was needed to separate these two.
As the 120th minute approached, the match was labouring towards a penalty shootout, until a brilliant Luka Modric pass set Ante Rebic through, with the pacey forward winning a penalty. Modric stepped up to take it, only to see Kasper Schmeichel make a brilliant save.
In the shootout, Modric redeemed himself, converting his spot kick, but it was goalkeeper Danijel Subasic who was the hero, becoming only the second goalkeeper to save three penalties in a shootout at the World Cup to earn his side victory.
IMAGE: Croatia's goalkeeper Danijel Subasic saves the first penalty from Christian Eriksen of Denmark (not pictured) in the penalty shoot-out during the World Cup Round of 16 match, at Nizhny Novgorod Stadium. Photograph: Julian Finney/Getty Images
Croatia needed nerves of steal once more to book a first semi-final spot since 1998, as well as boundless energy to counter a Russia side with the support of a nation behind them in Sochi.
Denis Cheryshev's curler for Russia was cancelled out by Andrej Kramaric within the 90 minutes, before Domagoj Vida looked to have headed the winner in extra time.
Mario Fernandes' late equaliser took the game to penalties though, where Danijel Subasic was again the hero, making one save, and watching another wide as Croatia became the first side to win two penalty shootouts at a World Cup since Argentina in 1990.
IMAGE: Croatia players celebrate winning the penalty shootout. Photograph: Kevin C. Cox/Getty Images
Having fallen behind early on to Kieran Trippier's sizzling free-kick, Croatia rarely looked like getting back into the match in the first half. But Ivan Perisic's 68th-minute equaliser turned the match on its head, and from then on, it looked like there was only going to be one winner.
Perisic thundered a strike against the post in normal time, before England goalkeeper Jordan Pickford made a stunning stop to deny Mario Mandzukic in extra time. However, Croatia's leading marksman was not kept out for long, as he latched onto Perisic's flick to fire home what proved to be the winner as Croatia booked their first ever spot in a World Cup final.
IMAGE: England's keeper Jordan Pickford punches the ball as he makes an aerial clearance. Photograph: Christian Hartmann/Reuters