Chris Smalling has been an ever present so far for England at the tournament producing great performances in the centre of defence. Wayne Rooney has been a key player for England so far as well despite not starting their last group game against Slovakia as he was given a rest.
Marcus Rashford made his tournament debut, as a substitute, for England against Wales during their 2-1 win, to become the nation's youngest player at a European Championship.
After a draw against Slovakia in their last group game, England finished second in their group and will face Iceland in the last 16.
Massive achievement for Northern Ireland
Paddy McNair has helped Northern Ireland through to the last 16 after finishing as one the four best third-place sides at the tournament. McNair started the first game against Poland and came on as a second-half substitution against Ukraine during Northern Ireland's first ever win at a European Championships.
McNair will be hoping to be part of the Battle of Britain in the last 16 against Wales after not playing the final group game, which they lost to Bastian Schweinsteiger's Germany team.
Schweinsteiger came into the tournament not having played since March due to a knee injury, but came on in Germany's opening game against Ukraine and scored.
Schweinsteiger didn't play in the second game but came on as a substitute against Northern Ireland to set a German European Championships appearance record of 15.
The midfielder will be hoping to play a part during his team's last 16 match against Slovakia as they look for revenge having lost to the same team in a warm-up game before the tournament.
Players looking to play a part during the last 16 games
Matteo Darmian and David de Gea will come up against each other in the last 16 after it was confirmed that Italy would be playing Spain.
Darmian started Italy's first group game which they won against Belgium but was an unused substitute in the win against Sweden. Darmian, with Italy already qualified for the last 16 at this point, came on for the final half-hour of the game which they lost against the Republic of Ireland.
De Gea has finally made himself the Spain number one at Euro 2016 and is set to make his fourth successive appearance in the competition against Italy,
The United man kept two clean sheets in the first two games against the Czech Republic and Turkey before conceding two in his side's loss to Croatia which saw them finish second in the group.
Marouane Fellaini will be hoping to play a part for Belgium in their last 16 tie against Hungary after being an unused substitute for the last two games for his country at the tournament.
Fellaini started the first group game which they lost to Italy and even earned praise from manager Marc Wimots but has not played since and, therefore, will jumping at the bit to play some part in the next game.
Anthony Martial and Morgan Schneiderlin will be hoping to feature in the last 16 for France against the Republic of Ireland.
Martial came on as a second-half substitute in France's opening win over Romania before starting the second game against Albania. The forward, though, was an unused substitute during his side's draw against Switzerland in their final group game.
Schneiderlin has so far not been used in any of the games with him watching on during his side's success. The midfielder, therefore, will be hoping that at some point he is called upon to play.