The official, who was standing in front of the away supporters, was treated for a cut to the back of his head.
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Steven Gerrard left as Liverpool's under-18s coach to take charge of Rangers, and Jurgen Klopp has been pleased with the start of his tenure.
Celtic have promised a full investigation after five people were injured trying to get into Celtic Park for the Old Firm derby on Sunday.
Olivier Ntcham's 62nd minute strike was enough for Celtic to beat Rangers and send Steven Gerrard home empty-handed in his first Old Firm derby.
Burnley's European adventure came to an end on Friday as the Premier League side crashed out of the Europa League playoff round with a 1-1 draw.
Rangers winger Jamie Murphy will miss the rest of the season after suffering a knee ligament injury, manager Steven Gerrard said on Wednesday.
Steven Gerrard said artificial turf has no place in "elite football" after seeing one of his Rangers players injured in a game at Kilmarnock.
Rangers boss Steven Gerrard said his team "won't get carried away" with first-leg Europa League lead over Maribor.
Rangers striker Alfredo Morelos will be available to play in Sunday's Premiership clash against St Mirren after he had his red card rescinded.
New Rangers boss Steven Gerrard said the "world is against" his club and has been for years after disagreeing with a number of decisions on Sunday.
Steven Gerrard was denied a win in his first Scottish league game as Rangers manager by an injury-time goal on Sunday.
Frank Lampard said he and Steven Gerrard have discussed the challenges of being first-time managers before their clubs' domestic campaigns begin.
Steven Gerrard said that his Rangers team was spurred on by comments from Croats Osijek as they advanced 2-1 on aggregate in the Europa League.
A mass brawl before Rangers' Europa League match in Glasgow clash left two men in the hospital with stab wounds, police said.
A year after being humbled by Luxembourg part-timers Progres Niederkorn, Rangers advanced to the second round of the Europa League qualifiers.
Rangers handed Steven Gerrard a win in his first competitive match as a manager by beating Macedonian side Shkupi 2-0 in the Europa League.
Umar Sadiq has revealed that the allure of working under Steven Gerrard was influential in his decision to sign for Glasgow Rangers.
Gerrard left Liverpool at the end of the 2014-15 campaign and headed for Major League Soccer side LA Galaxy before retiring from football in 2016.
Pena, 28, will play for Necaxa for the remainder of his loan after Pedro Caixinha, his former manager at Rangers, cut his spell short.
Ejaria, 20, will arrive at Ibrox alongside coaches Gary McAllister and Michael Beale who also leave Liverpool.
Steven Gerrard took a break from his new job as Rangers manager to take in a performance by superstar DJ David Guetta in Ibiza.
England manager Gareth Southgate praised Steven Gerrard and Frank Lampard for making "brave" choices to start their managerial careers.
Rangers have announced plans to slash Celtic's ticket allocation for visits to Ibrox, leading Celtic to swiftly indicate that they will follow suit.
The club have been hit with two charges relating to complying with UEFA rules, observing the principles of sportsmanship.
Scott Arfield has joined Rangers from Burnley on a four-year deal, becoming the first signing of the Steven Gerrard era.