Slavia Prague said they had filed a criminal complaint over an "attack" on Ondrej Kudela after Rangers midfielder Glen Kamara alleged the defender racially abused him in a Europa League match.
Celtic's latest stumble at Dundee United on Sunday ended Rangers' long wait for Scottish Premiership title.
Steven Gerrard, former England player and teammate of sacked Chelsea manager Frank Lampard, said the club should have supported the manager during a tough period.
Steven Gerrard's Rangers travel to Celtic for the first Old Firm derby of the season on Saturday, but their cross-city rivals could be without four key players due to coronavirus restrictions.
Steven Gerrard accused the Scottish Professional Football League (SPFL) of making an "absolute mess" of its end-of-season proposal.
Caroline Wozniacki ended her professional tennis career after her loss in the Australian Open.
Steven Gerrard, appointed as Rangers manager in May 2018, led the club to a runners-up spot in the league in his first season.
Liverpool are chasing their first English top-flight title since 1990 and a victory over the Chelsea at Anfield would be a big step toward that dream.
Gerrard also faces the challenge of outfoxing his former manager at Liverpool in Celtic's Brendan Rodgers.
Steven Gerrard played for Premier League club Liverpool from 1998 to 2015 also captaining the side later in his career.
Steven Gerrard spent 17 years at his home-town club Liverpool, 12 as captain, and won seven major honours including the 2005 Champions League before finishing his career with an 18-month stint at LA Galaxy
Steven Gerrard spent his entire club career at Liverpool before moving to Los Angeles in 2015. In 34 appearances during an injury-plagued tenure with the Galaxy, Gerrard scored five goals with 14 assists.
Steven Gerrard is out of contract with Los Angeles Galaxy following the completion of the club's season last weekend in the Major League Soccer playoffs.
Steven Gerrard, 35, left Liverpool for Los Angeles Galaxy last year. he said he has had a talk with manager Jurgen Klopp and the club wants him to be part of coaching staff
Steven Gerrard is currently on a post-season break from his Los Angeles Galaxy commitments after joining the MLS club from Liverpool earlier this year.
Chelsea F.C. manager Jose Mourinho says Liverpool legend Steven Gerrard's claims that there was a rift between him and John Terry