Barry Ferguson says Athletic Club duo Inaki and Nico Williams will pose a significant threat to Rangers tomorrow evening.
Ibrox is primed and ready for yet another European night under the lights as the team who currently sit fourth in Spain's La Liga make the trip to Govan.
Rangers narrowly defeated Jose Mouurinho's Fenerbahce to reach the Europa League quarter-finals, although Ferguson reckons Athletic will be a noteworthy step up from the Turks, as he outlined some of their key threats.
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He said: "In my opinion, they’ve got quality all over the team.
"Certainly, in the wide areas, you’ve got the two brothers, Williams [Inaki and Nico]. They’re going to be a real handful, but I look at midfield. Technically, very good. Very hard-working. Defensively, really solid.
"So we know as a group of players that we have to be at the top of our game to try and get a result."
Much has been made of Athletic and the fact they are hosting this season's Europa League final.
That has perhaps provided them an extra carrot, if ever needed, to go all the way.
Regardless, Ferguson reckons they are one of the likelier teams to go deep in the tournament: "I would probably say they're the favourites for the competition," he said.
"So we know it's a tough ask for us. But these games, I keep coming back to it, as a footballer, as a coaching staff, as a manager, these are the games you want to be involved in. Y
"You want to go and put your wits against some of the best. I think they've got real quality in their team. I've said that to the players over the last couple of days. This is what being a footballer is all about. These big nights at Ibrox."