|Full name||Giovanni-Guy Yann Sio|
|Date of birth||31 March 1989|
|Place of birth||Saint-Sébastien-sur-Loire, France|
|Height||1.80 m (5 ft 11 in)|
|2007–2009||Real Sociedad B||37||(0)|
|2012–2013||→ Augsburg (loan)||6||(0)|
|2013||→ Sochaux (loan)||13||(4)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 9 November 2014.
† Appearances (Goals).
Sio began his career with Nantes and joined in summer 2007 to Real Sociedad B after Nantes released him. He was promoted in summer 2008 to the Segunda División team. Sio signed a two-year deal with an option for a third year.
In January 2012 he joined VfL Wolfsburg for a fee reported as 5 million euros signing a four-year deal keeping him until 2016. He was sent to Augsburg on 10 July 2012 on loan until the end of the 2012–13 campaign. The loan was ended prematurely on 31 January 2013.
On 16 August 2013 it was announced that Sio had joined Basel on a four-year contract. At the end of the 2013–14 Super League season he won the league championship with Basel. They also reached the final of the 2013–14 Swiss Cup, but were beaten 2–0 by Zürich after extra time. During the 2013–14 Champions League season Basel reached the group stage and finished the group in third position. Thus they qualified for Europa League knockout phase and here they advanced as far as the quarter-finals.
Sio is also former member of the France national youth football team, he represented his country at U-15, U-16 and U-17. Sio was also called up to the Ivory Coast U-20 squad for the 2010 Toulon Tournament.
- Weitere Wechsel beim FC Sion
- Football : Giovanni Sio à la Real Sociedad : c'est fait !
- Ein Paraguayer und ein Franzose stossen zu den Wallisern
- Wallis: Rober Antonio Servìn und Giovanni Sio neu beim FC Sitten
- "Wolfsburg sign strike pair Vieirinha and Sio". Sport.co.uk. 4 January 2012. Retrieved 29 August 2012.
- Giovanni Sio verstärkt den FCA
- "Basel holt Giovanni Sio als Ersatz für Raul Bobadilla". Aargauer Zeitung. 16 August 2013. Retrieved 19 August 2013.
- Grossenbacher, Sacha (2014). "Fotos vom Spiel gegen Lausanne sowie den anschliessenden Feierlichkeiten" (in German). FC Basel 1893. Retrieved 2014-05-18.
- Transfer-Wirbel beim FC Sion