With four games on Wednesday in Euro 2016, we take a look at the three key players to keep an eye on.
Hungary, who currently sit top of the group table with a victory and a draw under their belt, would secure a place in the final 16 if they beat Portugal at the Stade des Lumieres.
Elsewhere in Group F, Iceland take on Austria with both teams hoping to strengthen their chance of making it past the group stages.
After that we have two Group E clashes, with group winners Italy facing bottom-place Republic of Ireland and Sweden taking on Belgium.
Here are three players to keep an eye out for in those crucial ties...
Cristiano Ronaldo
A missed penalty marked a desperately disappointing night and a bruised ego for Ronaldo, whose failure to convert his spot-kick cost Portugal the chance to earn their first three points of the tournament in the 0-0 draw with Austria on Saturday.
But Ronaldo doesn't take losing lightly, and is bound to bounce back when his side take on Hungary on Wednesday.
Ronaldo, who scored the winning penalty in Real Madrid's Champions League victory over Atletico Madrid just last month, will be looking to return to winning ways in order to keep alive Portugal's dreams of progressing to the next stage.
But the question on many lips will be; after 36 failed free-kicks in major tournaments, will any of his Portuguese team-mates have the confidence to push him off set piece duty?
Gylfi Sigurdsson
Iceland will again be looking to Gylfi Sigurdsson to provide flair to the smallest nation ever to qualify for a major tournament when they meet Austria at the Stade de France.
Sigurdsson scored a cool penalty in his side's 1-1 draw against Hungary on Friday, and will be looking to go one better in the hope of upsetting the odds to make it out of the group stages.
The highly-rated Swansea midfielder played a key role in ensuring a 12th-place finish last term, and has once again proved his class with some impressive attacking flair. In a team full of engines, Sigurdsson's calmness stands out.
Romelu Lukaku
Victory over Sweden would send Belgium through to the last 16, and the Red Devils will be hoping for a repeat performance from Lukaku after he scored twice in their 3-0 win over the Republic of Ireland.
The 23-year-old striker failed to capitalise on chances in Belgium's opening defeat to Italy, but if his last performance is anything to go by, he is likely to make a nuisance of himself leading the attack against Sweden.
The Everton striker may even be putting himself in the shop window for Europe's top clubs, having expressed his desire to play Champions League football.