The Blues are having a bad season but it may have wider reaching effects with a huge international tournament on the horizon at the end of the season

Getty ImagesAlvaro Morata | Spain

Alvaro Morata was left out of Julen Lopetegui's Spain squad for the first time since he joined Chelsea when his bad form hit ahead of the selection for the games against Germany and Argentina in March. 

The Chelsea striker was key in the qualification campaign for Spain, but he was described as "frustrated" by his friend Marcos Alonso, who earned his first call-up for those friendlies. 

Lopetegui picked Diego Costa, Rodrigo and Iago Aspas ahead of Morata, but offered some encouraging words to the Chelsea man. 

"There are many players that deserve to be in the national team but are not here," Lopetegui told Onda Cero radio. "Alvaro has gone through a spell with injuries and that is why we considered it best for him not to be on this list.

"I did call Alvaro before giving the list to tell him that he was not going to come. It's my duty and I do it also with many other players. It's normal that all the players want to come and feel frustrated if they don't."

AdvertisementGetty ImagesDavid Luiz | Brazil

David Luiz has not played for Brazil since March 2016 as Tite moves the Chelsea centre-back out of his favoured group, with a call now looking very unlikely. 

The 30-year-old was struggling to be selected even when he was in top form, but he has since seen his chronic knee injury worsen, as his team's form also drops. 

Luiz is fifth or sixth on the pecking order and his best hope may be that a new coach comes in and reinstates him into the reckoning after the tournament is done. 

Catherine Ivill/Getty ImagesTiemoue Bakayoko | France

Tiemoue Bakayoko's debut season at Chelsea has been nothing short of a disaster since he made his £40 million move from Monaco last summer. 

Antonio Conte tried hard to integrate Bakayoko into his starting line-up, but his good performances were outnumbered by his poor ones and he is now often seen on the bench. 

His sending-off against Watford was pivotal and it could go down as one of the Premier League's worst-ever displays. 

This poor form, coupled with an immense competition for places with France, means it is almost certain that Bakayoko won't build upon his solitary cap for his national team in the summer. 

Getty ImagesGary Cahill | England

Gary Cahill is used to being an ever-present in both Chelsea's and England's squads but things have changed for him recently. 

The good form of Antonio Rudiger has meant that Chelsea's captain has often been left on the bench, which has become a big problem for Cahill in a World Cup year. 

Gareth Southgate admitted it was hard to leave out Cahill, who still holds some hope of getting back in to the Russia 2018 squad, for the recent games against the Netherlands and Italy. 

Southgate said: "Tarkowski and Mawson are players you want to look at for now and beyond the summer. I want to see [Eric] Dier in a back three, too. It’s a very difficult call because Gary has played a lot of qualifiers and is a great guy."