GUS MacPherson has told his players to impose themselves on Motherwell as the Morton boss plots a Scottish Cup shock at Fir Park tonight.

Having watched the Well in a scouting capacity on numerous occasions this season, the 52-year-old believes seeing off Graham Alexander’s side will be the biggest challenge since taking charge at Cappielow.

MacPherson says he'll look to utilise the options available to him and believes his side must impose their style of play on the Premiership side if they are to progress to the quarter-finals.

He told the Tele: “Beating Motherwell tonight would probably be the biggest challenge that we’ve met, certainly since we’ve come in and taken the job in the short space of time that we have had.

“I’ve watched Motherwell a few times this season when I was scouting before I came in and they are a good team - we’re under no illusions of that.

“They’re a very attack-minded team who have a lot of energy and we need to match all those attributes that Motherwell have got but also, within that, we’ve got to try and impose ourselves on the game as well.

“We’ve not decided of the team selection as of yet but what we’ve done even in the short space of time we’ve been here is make changes to what we believe is right for each game.

“There isn’t a set team that we believe is our out and out strongest 11.

“We don’t know the players as well as we possibly could do because of the limited time we’ve had with them.

“What we do, though, is pick the team that we feel is best suited to each game.

“The games are coming thick and fast, they’ve been like that for the last five or six weeks.

“You hear it quite often from players who say that they would rather play games than train and that’s the case just now.

“A lot of the training sessions are focusing on mainly recovery and than preparation towards games.”

MacPherson revealed that his players aren’t fazed by being labelled the underdogs ahead of the fourth round clash.

He called for his side to maintain their competitiveness and put any outside noise to one side as he looks to move within 90 minutes of a trip to Hampden.

He said: “The players can't control what tags they’re labelled with, the underdog tag comes from other parties.

“I’d have said that we’d have been underdogs against Dunfermline with their placing in the league and their aspirations, so we had to deal with that side of it then.

“But every game is different and you’ve got to make sure that you’re competitive in every single game.

“It doesn’t matter if you’re playing a League Two team or a Premiership side, you’ve just got to make sure that you’re competitive and you cannot afford to be disrespectful either.”