Paris Saint-Germain are also said to be monitoring the situation, and according to Italian publication TuttoMercatoWeb, Chelsea are now in the hunt for the Portuguese star.
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Chelsea have reportedly joined the race to sign Sporting Lisbon midfielder William Carvalho
The 23-year-old was crowned player of the tournament as Portugal won the Under 21s European Championships last summer.
The winger is currently contracted to Sporting Lisbon until the summer of 2018.
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The 23-year-old has 13 international caps for his country
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Carvalho, who has 13 international caps for his country, is likely to be subject to a lot of interest from Europe's top clubs when the transfer window reopens in January.