In the 2013–14 season, Sion competed in the Swiss Super League and the Swiss Cup. In the summer transfer window 2013, the Chairman promoted 7 U21 players to the 1st Team. To bring stability and experience in they bought Vincent Rüfli and Xavier Kouassi from Servette FC, Pa Modou Jagne replacing Arnaud Bühler, twenty-one-year-old Freddy Mveng, Demitris Christofi as a winger and Ismael Yartey on loan as well as Beg Ferati and Ovidiu Herea.

The 2013–14 season began rather poorly with Sion not scoring a goal until the 7th round and setting a new record in the Swiss Super League for the lowest scoring season start. Decastel played with a 4-2-3-1 system.

Squad

No.	Name	Nationality	Position	Date of birth (Age)	Signed from
Goalkeepers
1	Andris Vanins		GK	(1980-04-30) 30 April 1980	Ventspils
18	Steven Deana		GK	(1990-03-04) 4 March 1990	Vaduz
30	Mathieu Debonnaire		GK	(1987-04-26) 26 April 1987	FC Lausanne-Sport
Defenders
4	Milos Bakrac		CB	(1992-02-25) 25 February 1992	Trainee
5	André Marques		LB	(1987-08-01) 1 August 1987	Sporting CP
13	Mathieu Debons		LB	(1992-09-21) 21 September 1992	Trainee
17	Pa Modou Jagne		LB	(1989-12-26) 26 December 1989	FC St. Gallen
20	Vilmos Vanczák		RB	(1983-06-20) 20 June 1983	Újpest
22	Vincent Rüfli		RB	(1988-01-22) 22 January 1988	Servette FC
27	Léo Lacroix		CB	(1992-02-27) 27 February 1992	Trainee
28	Beg Ferati		CB	(1986-11-10) 10 November 1986	SC Freiburg
32	Arnaud Bühler		LB	(1985-01-17) 17 January 1985	SC Freiburg
Midfielders
2	Benjamin Kololli		MF	(1992-02-15) 15 February 1992	Trainee
6	Xavier Kouassi		MF	(1989-12-28) 28 December 1989	Servette FC
7	Demetris Christofi		MF	(1988-09-28) 28 September 1988	Omonia Nicosia
8	Vullnet Basha		MF	(1990-07-11) 11 July 1990	Neuchâtel Xamax
10	Ovidiu Herea		MF	(1985-03-26) 26 March 1985	Rapid București
14	Freddy Mveng		MF	(1992-05-29) 29 May 1992	BSC Young Boys
15	Ismael Yartey		MF	(1990-01-11) 11 January 1990	Loan From FC Sochaux
16	Matteo Fedele		MF	(1992-07-20) 20 July 1992	Trainee
23	Dario Vidosic		MF	(1987-04-08) 8 April 1987	Adelaide United FC
24	Max Veloso		MF	(1992-03-27) 27 March 1992	Neuchatel Xamax
34	Ndoye Birama		MF	(1994-04-17) 17 April 1994	Trainee
Forwards
9	Fousseyni Cissé		ST	(1989-07-17) 17 July 1989	Le Mans FC
11	Léo Itaperuna		ST	(1989-04-12) 12 April 1989	Arapongas
19	Gaetan Karlen		FW	(1993-07-06) 6 July 1993	Trainee
21	Ebenezer Assifuah		FW	(1993-07-03) 3 July 1993	Liberty Professionals F.C.

Out on loan

Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

No. Pos. Nation Player 17 FW  SUI Danick Yerly (at Chiasso) 16 MF  SUI Joaquim Adao (at Chiasso) 4 DF  BRA Adaílton (at FC Chiasso) 18 GK  SUI Kevin Fickentscher (at FC Lausanne-Sport) 34 DF  SUI Anthony Sauthier (at Servette FC)

Transfers

Summer

In: Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality. No. Pos. Nation Player 30 GK  SUI Mathieu Debonnaire (from FC Lausanne-Sport) 17 DF  GAM Pa Modou Jagne (from FC St.Gallen) 22 DF  SUI Vincent Rufli (from Servette FC) 28 DF  SUI Beg Ferati (from SC Freiburg) 31 DF  ARG Emiliano Dudar (from FC Chiasso) 6 MF  CIV Xavier Kouassi (from Servette FC) 10 MF  ROU Ovidiu Herea (from București) 14 MF  SUI Freddy Mveng (from BSC Young Boys) 15 MF  GHA Ishmael Yartey (from FC Sochaux) 7 FW  CYP Demitris Christofi (from Omonia Nicosia) 21 FW  GHA Ebenezer Assifuah (from Liberty Professionals F.C.) 23 MF  AUS Dario Vidosic (from Adelaide United FC)

Out: Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality. No. Pos. Nation Player 3 DF  BRA Aislan 6 MF  SUI Joaoquim Adao (on loan at Chiasso) 8 MF  ITA Gennaro Gattuso (Retired, Manager at Palermo) 9 FW  BRA Danilo ( Zorya Luhansk) 10 MF  TUN Ousamma Darragi (Espérance de Tunis) 11 FW  CMR Yannick N'Djeng (Espérance de Tunis) 12 FW  NIR Kyle Lafferty (US Palermo) 15 DF  NED Michael Dingsdag 16 MF  SUI Didier Crettenand (Servette) 17 FW  SUI Danick Yerly (on loan at Chiasso) 18 GK  SUI Kevin Fickentscher (on loan at Lausanne) 21 MF  FRA Karim Yoda 22 MF  SRB Dragan Mrdja 24 MF  SUI Xavier Margairaz 25 MF  SUI Evan Melo 32 MF  SUI Anthony Sauthier (Servette) 33 DF  BRA Adaílton (to Chiasso) 34 FW  SUI Aleksandar Prijovic ( Djurgardens)