Hibernian manager Bobby Williamson has urged his players to prove they are international class as Rangers arrive intent on maintaining their lead in the Scottish Premier League.
The Edinburgh side have lost three times already this season to the side led by their former boss, Alex McLeish.
Rangers will arrive without inspirational Italian defender Lorenzo Amoruso and will hold off giving a debut to new signing Jerome Bonnissel.
But Williamson knows that his own side face a tough battle, not only with the quality of the opposition but with their own mentalities.
 We lack mental toughness  Hibs manager Bobby Williamson
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"The games have not been one-sided by any stretch of the imagination and in some of them we have felt hard done by," he said.
"But we need to show mental toughness and mental strength to get a result, whether that's a draw or a victory.
"We've all got ability, that's not in question, but we lack mental toughness. But, if we can develop that, we shouldn't be too far away."
Williamson is looking for another five-star performance from midfielder Grant Brebner, who scored a hat-trick in the hard-fought 3-2 Scottish Cup win away to Dundee United on Saturday.
The Hibs boss suggested that the 25-year-old and all the other younger players at Easter Road should be setting their sights on the international stage in addition to performing well for the club.
"International football has got to be a target for every player at Grant's age and with his ability and talent," claimed Williamson.
"Grant's been unfortunate because he had a good run at the beginning of the season but got injured and was left out.
"But I felt he deserved the nod over John O'Neil before Saturday's game, although others may have suggested otherwise.
Lorenzo Amoruso will miss the trip to Edinburgh |
"Grant got his opportunity and did well."
Bonnissel, signed this week from Bordeaux, will have to wait until the weekend before being given the chance to make his debut.
McLeish has decided not to include the Frenchman in the squad for Easter Road, choosing instead to hand him his debut at Ibrox, when Rangers take on Aberdeen on Saturday.
"He's doing fine, but we won't include him for Easter Road though," said McLeish.
"I know he can handle it, but we've arranged another game for the reserves tomorrow night and it's likely he will play a part in that."
As well as Amoruso, who suffered a clash of heads on cup duty against Arbroath, Rangers are without injured midfielder Mikel Arteta and forwards Peter Lovenkrands and Steven Thompson.
Celtic v Dundee Utd
Celtic midfielder Neil Lennon is back in training
Celtic begin their post-winter break chase of Scottish Premier League leaders Rangers by going into the virtual unknown against a reconstructed Dundee United.
The league's bottom side seem likely to arrive at Celtic Park with a completely new defence following three transfer window acquisitions.
Sweeper Daniele Chiarini, who impressed against Celtic before leaving Partick Thistle, and former Livingston full-back Gary Bollan could both team up with former Dunfermline Athletic central defender Andy Tod.
Tod completed his loan move from Bradford City on Tuesday as Bollan returned for his second spell at Tannadice.
Paul Hegarty is capable of sorting them out Celtic boss Martin O'Neill
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Celtic will be without any new faces but could welcome back Northern Ireland midfielder Neil Lennon after long-term injury.
Lennon played himself into contention after coming through an Under-21 game unscathed on Monday and returns to the reigning champions' squad for the first time since pulling his hamstring against Celta Vigo.
Celtic boss Martin O'Neill said: "He played last night and he came through the game pretty okay, so I will see how he is tomorrow morning.
"He doesn't feel too bad, but he has a bit of stiffness in his hamstring, which is natural."
United counterpart Paul Hegarty has added former Rangers striker Billy Dodds to their line-up since their last meeting - and last defeat - to Celtic in November.
"I know he's been trying to improve the squad," said O'Neill. "He's got a couple of players coming in now and there's competition for places.
"I like Paul Hegarty and he's got determination and drive, but he needs luck between now and the end of the season.
"He is capable of sorting them out and the first league game back is certainly a big one, but we start as favourites and we have to win it."
We need as many experienced players as possible Dundee Utd boss Paul Hegarty
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Hegarty has complained that his side have been "losing goals at an alarming rate" and they lost 3-2 to Hibernian in the Scottish Cup despite Chiarini making his debut.
That could persuade the manager to give his latest new signings a quick introduction.
Bollan has been a regular at Livingston, but Tod has been frozen out since early December because Bradford could not afford to give him another appearance as it would have triggered an extra payment to Dunfermline.
"Gary has been here before and is a player I know well," said Hegarty.
"He will add steel and determination to our defence and those are qualities I want in my team.
"As for Andy, he is on loan until the end of the season and, with the position we are in at the moment, we need as many experienced players as possible."
Kilmarnock v Motherwell
Terry Butcher has faith in Steven Craig (left) |
New Motherwell signing Steven Craig is expected to be pitched straight into the starting line-up as Terry Butcher's side aim to defeat Kilmarnock for the second time in five days.
With Scotland international James McFadden beginning a four-match suspension and Dirk Lehmann still doubtful with a hamstring problem, Well could be left short of firepower at Rugby Park on Wednesday.
But Butcher, whose side knocked Killie out of the Scottish Cup at the same venue on Saturday, is confident that Craig could make an instant impact.
The 21-year-old was deemed surplus to requirements at First Division Falkirk.
I know he is hungry and wanting to prove a few people wrong Motherwell boss Terry Butcher
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But, following a trial spell, Butcher snapped him up until the end of the season.
"I've known him since he was about 15 or 16 when he was Raith Rovers and I was on the staff there," said Butcher.
"I also watched him play for Falkirk a few times and I know he is hungry and wanting to prove a few people wrong.
"We think he is well worth a contract until the summer."
Well will also be without Steven Hammell, who serves a one-match suspension, and striker Khaled Kemas, who has a knee problem.
Killie boss Jim Jefferies has also been forced to make changes because of injury and suspension.
Defender Chris Innes begins a two-match ban for offences in earlier league matches.
He was sent off in Saturday's cup game, but his suspension for that misdemeanour will not come into effect until next season's competition.
Winger Andy McLaren is also banned, while midfielders Jesus Sanjaun and Gary Locke are both sidelined through injury.
Forward Sean Hessey and defender Peter Canero remain long-term absentees.
Striker Gary McSwegan, who was a late substitute on Saturday, faces a late fitness test on a hamstring problem.
