Russell Martin was sent-off after furiously arguing with a referee during Rangers’ pre-season clash with Middlesbrough.The newly-appointed Gers manager watched the second half of his side’s 2-2 draw with Boro from the stands following a dispute at half-time with match official John Beaston.GettyRussell Martin let his frustrations get the better of him in pre-season[/caption]Rangers fell behind to an early Neto Borges goal, but looked as though they might be given a way back into the clash when Luke Ayling appeared to handle the ball in the box at a corner.But the Scottish side were denied a penalty, as Beaston waved away their protests, meaning they went in at half-time 1-0 down.Martin was left incensed by this, who left his technical area to vent his frustrations to the fourth official on the touchline.And he wasn’t done there, confronting the referee over the decision as the teams headed down the tunnel at half-time.This proved to be the final straw for Beaston, as Martin was then seen watching the second-half from the gantry above the dugout.In his absence, Rangers managed to pull off an impressive comeback, with Boro doubling their lead through Dael Fry, before goals from Danilo and Findlay Curtis snatched a draw.And after the match, the Teddy Bears’ boss confirmed he had been missing from the touchline after overstepping the mark in his half-time protests, as he explained his frustrations.He said: “It was frustration a bit as well about the performance in the first half.“I didn’t like the energy or the body language of too many on the pitch.“I think we should have had a penalty. The fourth official didn’t help the officials.GettyMartin had a slightly different view of things in the second half[/caption]GettyThis didn’t affect his players though, who fought back from 2-0 down[/caption]View Tweet: https://t.co/FCxCcUgth2“I’m a passionate guy and I probably overstepped the mark.”And Martin, who was sacked by Southampton in December, admitted he will need time to learn how to address officials in Scotland, with this his first job away from English football.The 39-year-old continued: “I enjoyed watching the second half from the stand… it was a good view.“In friendlies I hope I don’t have to spend too long up here. I went and apologised to the official.”“I need to get used to how it works up here as well as down the road.“I got a good view of the game and he got peace and quiet.”Martin won promotion from the Championship with Southampton in 2024, but struggled after his side returned to top-flightGettyMartin will certainly be relieved his sending off in the pre-season clash has no bearing on his involvement in future matches.Rangers are back in competitive action on Wednesday, as they take on Panthinaikos in the second leg of their Champions League second round qualifier.The Scottish outfit head into the tie with a 2-0 aggregate lead, and will be desperate to defend their lead as they look to continue their bid to reach the group stage of Europe’s elite competition.Should they advance against Panathinaikos, Rangers will need to win in the third qualifying round to set up a final two-legged play-off to reach the Champions League proper for the first time since 2022.As for Martin, he will be hoping to hit the ground running at Ibrox following his appointment in June.The former Norwich defender is looking to get his managerial career back on track after being dismissed by Southampton in December with his side sitting bottom of the Premier League table.