Career as a coach
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 07/2016 - 10/2016 |  | Aston Villa |  England | Manager |
| 10/2014 - 06/2015 |  | FC Schalke 04 |  Germany | Manager |
| 03/2012 - 11/2012 |  | Chelsea FC | England | Manager |
| 07/2011 - 03/2012 | | Chelsea FC | England | Ass. Coach |
| 07/2009 - 02/2011 |  | West Bromwich Albion | England | Manager |
| 07/2008 - 06/2009 |  | Milton Keynes Dons | England | Manager |
Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 07/1996 - 06/2002 | | Chelsea FC | England | Midfield | 16 |
| 07/1995 - 06/1996 |  | Lazio Roma |  Italy | Midfield | 16 |
| 07/1993 - 06/1995 | | Lazio Roma | Italy | Midfield | |
| 07/1992 - 06/1993 |  | FC Aarau |  Switzerland | Midfield | |
| 07/1991 - 06/1992 |  | FC Zürich | Switzerland | Midfield | |
| 01/1987 - 06/1991 |  | FC Schaffhausen | Switzerland | Midfield |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Champions League | 9 | 3 | 6 | 1 | 380 | - | - | - | 1 | - | - | » All matches |
| Europa League | 16 | 16 | - | 4 | 1.331 | - | - | - | 1 | - | - | » All matches |
| UEFA Super Cup | 1 | 1 | - | 1 | 63 | - | - | - | - | - | - | » All matches |
| Cup Winners Cup | 15 | 15 | - | 1 | 1.341 | 3 | - | - | 1 | - | - | » All matches |
| Premier League | 119 | 108 | 11 | 21 | 9.615 | 15 | - | 13 | 24 | - | - | » All matches |
| FA Cup | 17 | 15 | 2 | 3 | 1.363 | 5 | - | - | 2 | 1 | - | » All matches |
| League Cup | 10 | 9 | 1 | 1 | 915 | 3 | - | - | 1 | - | - | » All matches |
| FA Community Shield | 2 | 2 | - | 1 | 191 | - | - | - | - | - | - | » All matches |
| Serie A | 88 | 85 | 3 | 5 | 7.599 | 7 | - | - | 18 | - | - | » All matches |
| Coppa Italia | 13 | 13 | - | 2 | 1.145 | - | - | - | 1 | - | - | » All matches |
| Super League | 101 | 91 | 10 | 4 | 8.255 | 7 | 3 | - | 12 | - | 1 | » All matches |
| Total | 391 | 358 | 33 | 44 | 32.198 | 40 | 3 | - | 61 | 1 | 1 |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | World Cup | 2 | 1 | 1 | 1 | 86 | - | - | - | - | - | - | » All matches |
| WC Qualifiers Europe | 7 | 7 | - | - | 630 | 1 | - | - | 2 | - | - | » All matches |
| WC Qualifiers Play-offs | 2 | 2 | - | - | 180 | - | - | - | - | - | - | » All matches |
| Friendlies | 14 | 14 | - | 6 | 994 | 1 | - | - | - | - | - | » All matches |
| EURO | 2 | 2 | - | 1 | 157 | - | - | - | - | - | - | » All matches |
| EURO Qualifiers | 7 | 6 | 1 | - | 576 | - | - | - | 1 | - | - | » All matches |
| Total | 34 | 32 | 2 | 8 | 2.623 | 2 | - | - | 3 | - | - |