Tomasz Marczyński is a Polish former road racing cyclist, who rode professionally between 2006 and 2021 for the Ceramica Flaminia–Bossini Docce (2006–08), Miche–Silver Cross–Selle Italia (2009), CCC–Polsat–Polkowice, Vacansoleil–DCM (2012–13), Torku Şekerspor (2015) and Lotto–Soudal (2016–21) teams.

The 2017 Vuelta a España was a three-week Grand Tour cycling stage race that took place in Spain between 19 August and 10 September 2017. The race was the 72nd edition of the Vuelta a España and the final Grand Tour of the 2017 cycling season. The race started in Nîmes, France, and finished in Madrid. It was the first time the race has started in France and only the third time it has started outside Spain, after 1997 (Portugal) and 2009 (Netherlands).