Trusty decision 'difficult to understand' - Rohl

Auston Trusty was booked for a challenge on Rangers' Jack Butland

Europa League: Rangers v Roma

Venue: Ibrox Stadium, Glasgow Date: Thursday, 6 November Time: 20:00 GMT

Coverage: Listen on BBC Radio Scotland & Sounds, live text commentary on the BBC Sport website

Rangers head coach Danny Rohl says it is "difficult to understand" why Celtic's Auston Trusty was not sent off in Sunday's League Cup semi-final for a "dangerous" challenge.

The defender's foot appeared to catch Rangers goalkeeper Jack Butland in the head as Rohl's side trailed 1-0.

The head coach did not want to comment on Trusty's challenge immediately after the game, preferring to praise his players despite their 3-1 loss in extra time.

But his club said they would be seeking talks with the Scottish FA and, after a meeting with head of referees Willie Collum, released a statement saying they "remain unsatisfied with the explanation" given.

Rohl was asked about the matter again as he prepares his side for Thursday's Europa League visit by Roma and was still unclear why the Celtic centre-back was shown a yellow card instead of red.

"I think this is maybe for me a little bit too difficult to understand," the German said.

"For me, it doesn't matter if it's from the side or the front. A kick against the head is always dangerous, because you could injure your opponent."

Rangers' feelings of injustice were heightened by the fact referee Nick Walsh had earlier sent off midfielder Thelo Aasgaard for a high tackle on Celtic right-back Anthony Ralston.

"I think you have always two sides," Rohl said. "The refs have their side and they're looking for the rules and we have our side and how we see something.

"It's a little bit more difficult with hand ball as there's so many rules with hand ball: is it this angle, is it that angle. But the tackle was difficult to understand. We got the red card, our opponent didn't."

Meanwhile, Rohl again praised his players for taking the tie to extra-time despite being reduced to 10 men.

"Even with the red card, we took it right to the end, but it was still not enough," he added.