Liverpool striker Luis Suarez has been banned for 10 games by the Football Association for biting Chelsea's Branislav Ivanovic.
The incident happened during Sunday's 2-2 draw between the sides.
The 26-year-old later apologised for biting the Chelsea defender and was fined by Liverpool on Monday.
The club, who have until Friday at 12:00 BST to appeal, said they were "shocked and disappointed" at the length of the suspension.
Uruguay international Suarez had accepted the FA charge of violent conduct but claimed his ban should be three games, the standard punishment for violent conduct.
9 months - Manchester United's Eric
Cantona for his 'kung-fu' style kick in
9 months - Chelsea keeper Mark
Bosnich who tested positive for
cocaine in 2003
8 months - Rio Ferdinand of
Manchester United for missing a
drugs test in 2003
12 games - QPR's Joey Barton for
two counts of violent conduct
against Man City players in 2012
11 games - Sheffield Wednesday's
Paolo di Canio for pushing over
referee Paul Alcock in 1998
10 games - Former Southampton
player David Prutton for shoving
referee Alan Wiley in 2005
9 games - Paul Davis of Arsenal for
punching Southampton's Glenn
Cockerill in 1988
8 games - Liverpool's Luis Suarez
for racially abusing Patrice Evra in
8 games - Man City's Ben Thatcher
for elbowing Portsmouth's Pedro
Mendes in 2006
5 weeks - Man United's Roy Keane
for comments made in his
autobiography in 2002
An FA statement read: "A three-person Independent Regulatory Commission today upheld The FA's claim that a suspension of three matches was clearly insufficient and the player will serve a further seven first-team matches in addition to the standard three. The suspension begins with immediate effect.
"The Liverpool forward had accepted a charge of violent conduct but had denied The FA's claim that the standard three-match sanction was insufficient for the offence.
"The incident was not seen by the match officials and has therefore been retrospectively reviewed.
"Suarez has until midday on Friday, 26 April to appeal the additional suspension, above the standard three matches."
The ban covers their final four games of this season, and the first six games of 2013-14.
LFC managing director Ian Ayre said: "Both the club and player are shocked and disappointed at the severity of today's Independent Regulatory Commission decision.
"We await the written reasons tomorrow before making any further comment."
It is not the first time Suarez has been charged with such an offence. He was banned for seven games when he was at Ajax after biting PSV Eindhoven midfielder Otman Bakkal's shoulder during a match in November 2010.
During his time at Liverpool, he was also given an eight-match ban and £40,000 fine by the FA for racially abusing Manchester United left-back Patrice Evra in December 2011.