ABERDEEN have signed winger Gary Mackay-Steven from Celtic.

The 26-year-old has signed a two-year contract at Pittodrie and has arrived in time to be eligible for Thursday's Europa League second qualifying round first leg against Bosnian side Siroki Brijeg.

Mackay-Steven slipped down the pecking order at Parkhead last season, making only eight appearances in the Ladbrokes Premiership including four starts, but had previously been a consistent contributor for the Hoops and his former club Dundee Unite The one-cap Scotland international will go straight into the squad for the Siroki tie, with fellow winger Scott Wright struggling for match-fitness.

Manager Derek McInnes, looking ahead to that tie, denied there is any extra pressure on his side following a terrible start for Scottish clubs in Europe which has seen both Rangers and St Johnstone fall at the first hurdle.

"We feel the responsibility for our own club," McInnes said. "There is always a pressure and demand on us to perform. What happens at other clubs, we can't affect.

"There's no doubt it was disappointing for our country and the league in general to lose a couple of teams early on but it can happen. Both teams would probably have been favourites and expect to go through, so it can happen.

"It shows when you are not quite able to be at your best you can be vulnerable.

"I don't think any team, with all the will in the world, with three and a half weeks' preparation going into a game at this level can be at your best but we have to be as close to it as we can to get through.

"I don't feel any added responsibility other than the responsibility to get my team through."

The Dons are the seeded team, but Siroki impressed in the first round with a 2-0 aggregate win over Ordabasy of Kazakhstan.

"They dealt with the previous tie really comfortably," McInnes said. "Siroki are a very well-coached team, good organisation. They don't score too many goals but they don't concede many. They didn't give away many opportunities in the previous tie.

"They have good energy in the middle of the park, good experience at the back, quick on the sides, and they are a good counter-attack team.

"They dealt with that away tie very comfortably and I can see they will be a good opponent."