Guimarares joined the club in January from Olympique Lyonnais in a deal worth £35million plus add-ons – and scored five goals.
And the 24-year-old midfielder – who was visited by his Brazil team-mate Lucas Paqueta last week – has posted a message to fans on Twitter following the conclusion of the club’s season at the weekend.
Guimaraes tweeted: “How crazy is to think that it was my first season here! It's even crazier to think that it was only 4 months! Thanks to all the fans for making me feel at home from the first game here! It was just the beginning! The future promises a lot of good things. See you soon @NUFC fans.”
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Newcastle, in the relegation zone when Guimaraes joined, ended the campaign in 11th place following Sunday’s 2-1 win over Burnley at Turf Moor.