| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| 1987 | Schaffhausen | - | 50 | 2 | 1992 | (Player) |
| 1992 | FC Aarau | - | 33 | 1 | 1993 | (Player) |
| 1993 | Lazio | - | 87 | 7 | 1996 | (Player) |
| 1996 | Chelsea | Β£4,900,000 | 119 | 15 | 2002 | (Player) |
| 2008 | MK Dons | - | 2009 | (Manager) | ||
| 2009 | West Bromwich Albion | - | 2011 | (Manager) | ||
| 2012 | Chelsea | - | 2012 | (Caretaker Manager) | ||
| 2012 | Chelsea | - | 2012 | (Manager) | ||
| 2014 | Schalke 04 | - | 2015 | (Manager) | ||
| 2016 | Aston Villa | - | 2016 | (Manager) |