The Bundesliga outfit have parted company with the 43-year-old after just two wins in 10 games in all competitions and turned to the former Chelsea boss

Schalke have confirmed the dismissal of Jens Keller as
coach and the appointment of Roberto Di Matteo as his
successor with immediate effect.
Keller's position had come under intense scrutiny after a
poor start to the 2014-15 season in which they fell at the
first hurdle in the DFB-Pokal, to Dynamo Dresden, but a
Champions League draw away to Chelsea lifted spirits in
Gelsenkirchen and back-to-back wins over Werder Bremen
and rivals Borussia Dortmund eased the pressure on the 43
year-old.
However, after a disappointing draw at home to Maribor las
week and defeat at Hoffenheim on Saturday, Keller met with
sporting director Horst Heldt on Monday and was relieved o
his duties.
Schalke then announced the following morning that Di
Matteo, who led Chelsea to Champions League glory in
2012, had been installed as the club's new coach.
"Schalke have parted company with Jens Keller," read a
brief statement on the club's official Twitter feed. "Roberto
Di Matteo takes over. "
Keller initially joined Schalke as the club's Under-17 coach
but took charge of the senior squad in December 2012,
succeeding Huub Stevens at the helm.
He was given a contract until the end of the season but
signed a two-year extension in the summer of 2013.
However, Keller has now paid the price for a run of just two
wins from 10 games in all competitions at the start of the
current campaign.
Consequently, Schalke have now turned to Di Matteo, who
has been without a full-time job since being sacked by
Chelsea in November 2012.
The Italian led the Blues to Champions League glory in his
then capacity as caretaker coach the season before, with
the Premier League outfit overcoming Barcelona in the
semi-finals before beating Bayern Munich on penalties in
the decider at the Allianz Arena.
However, after being given the job on a permanent basis
before the start of the 2012-13 season, he was fired after
Chelsea's defence of their European crown was effectively
ended by a 3-0 loss to Juventus in Turin.