First of all, here's Portugal's confirmed 26 man squad for Euro 2020:
Goalkeepers: Anthony Lopes (Lyon), Rui Patrício (Wolves), Rui Silva (Granada)
Defenders: Joao Cancelo (Manchester City), Nelson Semedo (Wolves), Jose Fonte (LOSC Lille), Pepe (Porto), Ruben Dias (Manchester City), Nuno Mendes (Sporting CP), Raphael Guerreiro (Dortmund).
Midfielders: Danilo Pereira (Paris), Joao Palhinha (Sporting CP), Ruben Neves (Wolves), Bruno Fernandes (Manchester United), Joao Moutinho (Wolves), Renato Sanches (LOSC Lille), Sergio Oliveira (Porto), William Carvalho (Real Betis).
Forwards: Pedro Goncalves (Sporting CP), Andre Silva (Eintracht Frankfurt), Bernardo Silva (Manchester City), Cristiano Ronaldo (Juventus), Diogo Jota (Liverpool), Goncalo Guedes (Valencia), Joao Felix (Atletico Madrid), Rafa Silva (Benfica).
Goalkeeper Rui Silva is yet to earn his first cap for Portugal, but he's been given the potential option if something happens to the two keepers in front of him.
18-year-old defender Nuno Mendes keeps his place in the squad after impressing in the qualifiers and with his team Sporting CP. His team-mate Pedro Goncalves earns his place in the squad, as he looks for his first cap at Euro 2020.
Cristiano Ronaldo enters his fifth Euro tournament with Portugal, as he looks to find international glory once more. The talent sweeps through the squad, which appears to be even stronger than the lot who won it back in 2016.
Now, it's time to find out which players have missed out on the Euro 2020 squad:
Andre Gomes (Everton)
The Everton man has struggled to work his way back into the Portugal side in recent years, and injuries certainly haven't helped him along the way.
Andre Gomes was selected for the preliminary squad of the 2018 World Cup, but he didn't make the cut for the official squad.
The midfielder hasn't participated for the national side since 2018, and now it appears playing for his country may be coming to an end.
Ricardo Pereira (Leicester)
The right-back has struggled to find his way back into the Leicester side, never mind Portgual, due to a cruciate ligament injury at the start of the season.
Two starlets Joao Cancelo and Nelson Semedo cover the place, and with the form of Cancelo this year, Ricardo Pereira would struggle to find any game time.
Pereira lost his place to Timothy Castagne in the Leicester side, and he just hasn't hit the heights in the games he played in like he used too. The 2021/22 season could be the process Pereira needs to get fully fit again and work his way back into both the Leicester and Portugal starting 11.
Francisco Trincao (Barcelona)
The 21-year-old was called up to the squad to compete in the Nations League for the first time in August 2020, but with the forward options Portugal has to offer, it may be too early for Francisco Trincao this time around.
Trincao was selected for the U21 Championship, but due to him being in contact with someone who tested positive for Covid-19, Trincao had to quarantine and withdraw from the tournament.
He's a tricky winger, who's shown what skills he has in his locker in his first season in a Barcelona shirt. If he carries on playing to his ability, he'll be part of the squad for the 2022 World Cup.
Gelson Martins (Monaco)
Funnily enough, Portugal had no choice in whether they could choose Gelson Martins or not, because he's been banned for six months from all football competitions when playing for Monaco.
In an away fixture against Nimes, the 24-year-old shoved referee Mickael Lesage after team-mate Tiemoue Bakayoko was sent off and after receiving a red card himself, Martins decided to push the referee for a second time.
On March 5th, this led to him being suspended for six months. Martins may have struggled to get into the side anyway with how strong their front line is. The pacy winger is normally selected for their squads though, so he would have been a useful asset.
Eder (Lokomotiv Moscow)
Yes, this may have been quite obvious, but how can we not talk about the man who brought ecstasy to the streets of Portugal in 2016. At 33 years of age, Eder may have played his last game for his country.
He now plys his trade in Russia, where he's been for the last four years at Lokomotiv Moscow. His last appearance for Portugal came in 2018, but he did not make the final cut for the World Cup.
Eder's extra-time goal was enough to settle Portugal and France in the Euro 2016 final, which gifted the Portuguese their first ever trophy in major competitions.
Honourable Mentions
A knee injury to Pedro Neto in April kept him away from the Portugal squad, which would've seen him participate in his first European Championships.
Cedric Soares was part of the Euro 2016 winning side and the 2018 World Cup team. For now, it could be all over for Soares with Portugal having incredible depth in the right-back position.
Paulinho and Pizzi have been displaying their skills in the Portuguese league, but this year it wasn't enough for the boss Leonardo Santos to pick them over any of the other attacking options they hold.