Maribor v Celtic preview

Celtic winger James Forrest has been ruled out of Wednesday's Champions League play-off against Maribor.

Forrest, who has been troubled by hamstring problems for a number of months, pulled up just seconds from the end of last week's 6-1 victory over Dundee United.

The Scotland forward has not travelled to Slovenia with the remainder of the squad and assistant manager John Collins admits concern over the frequency of his periods on the sidelines.

Speaking at Glasgow Airport Collins said: "I don't want to use the word fear, but obviously I am disappointed for James.

"He has worked really hard in the last three weeks to get himself back to match sharpness. He has had these niggling injuries the last couple of years but fingers crossed we can get him fitter and stronger and the injuries become less and less.

"It is disappointing for James but we will wait for him getting back fit because we know he is a good player."

Another to miss the trip is defender Adam Matthews who was replaced by Efe Ambrose before the start of the match against United after suffering a calf injury in the warm-up. Ambrose will be available on Wednesday, despite not travelling with the Celtic party that flew out on Tuesday.

The Nigeria defender was sent off in the 4-1 defeat by Legia Warsaw in Poland and sat out the second leg of the third qualifying round tie at Murrayfield.

Manager Ronny Deila explained: "In the beginning there were some communication problems, if he was ready or not. We didn't think he was ready because he got two matches (for the sending off) but in the end it was one match. So he is coming now and I am very happy because we need defenders."

Deila will also be able to call on the services of winger Derk Boerrigter who is available for selection despite serving a two-match domestic ban for simulation against St Johnstone last midweek.

Deila admitted the chances of including Ghana's Mubarak Wakaso in his matchday squad were slim. The winger is undergoing a medical in Russia after Celtic agreed a year-long loan deal with Ruban Kazan and the Hoops have until 11pm on Tuesday to register him in time to play.

Deila said: "It is going on but it doesn't seem like there is going to be anything today. It is hard to get the paperwork together. I am not 100 per cent sure but I think it is going to be hard to have him ready for the game against Maribor."

Maribor's main threat may come from winger Agim Ibraimi, a Macedonia international who spent last season on loan with Cagliari in Serie A.

Brazilian Tavares is the Slovenians' skipper and all-time top goalscorer; he recently became one of just six players to reach 300 appearances for the team.

Maribor were eliminated at this stage in the last two seasons - by Dinamo Zagreb and Viktoria Plzen respectively; their only previous Champions League group stage campaign was 15 years ago, when they beat Olympique Lyon in the final qualifying round.

Watch Maribor take on Celtic this Wednesday from 7.00pm live on Sky Sports 5