Sanches was considered one of Europe's rising talents after he helped Portugal win the 2016 European Championship.
The 35-man squad will be trimmed to the final 23 later this week on Thursday, May 17.
Renato Sanches, Euro 2016 young player of the tournament, has been left out of Portugal's squad for the World Cup. The 63 year old, previously he has managed the national team of Greece after managing prominents clubs in Portugal and Greece.
Coentrao started 25 league games as Sporting finished third in the Primeira Liga, behind champions Porto and Benfica, while he made a further 18 appearances in domestic and European cup competitions.
He was mocked for passing the ball straight out of play in an away game at Chelsea after seemingly confusing the colours on an advertising hoarding for a team-mate.
Manager Fernando Santos has announced Portugal's 35-man provisional squad for the 2018 FIFA World Cup, with Real Madrid superstar Cristiano Ronaldo taking centre stage.
In Group B, Portugal has to compete with Spain, Morocco and Iran teams.
Following the World Cup which to be held from June 14 to July 15 in Russian Federation the Portuguese team will be limited to 23 players before the Football sports carnival. Before then, Ronaldo and Co have three warm-up friendlies - against Tunisia on May 28, Belgium on June 2, and Algeria on June 6.