Kris Commons didn't like the feeling of his first Celtic defeat.
A double from John Sutton, younger brother of former Celt Chris, gave Motherwell a well deserved win over Celtic exactly a week after Neil Lennon's side had dominated and bullied Rangers in a 3-0 win at Parkhead.
After a glorious start to his Celtic career including scoring on his debuts at Hampden, Ibrox and Celtic Park Commons knows that his new side have to prove themselves all over again on Wednesday when Rangers return on Scottish Cup business.
"Losing today is a big blow going into Wednesday's game," the former Derby midfielder admitted. "Obviously, the unbeaten run goes out of the window, so it's important we get back into winning ways.
"You usually have two or three players who aren't quite at the races but to have 14 who played today not 100 per cent was very disappointing -- and the manner in which we lost the game.
"I don't think it will affect us psychologically on Wednesday, we're just concentrating on what we want to do and what we need to do. Our football will win games if we're all playing well.
"It was disappointing because none of us played to our potential. It certainly was a wake-up call for us, that you can't just turn up and play, you also need to work hard."
Anthony Stokes replaced Georgios Samaras in the starting XI but was substituted shortly after Sutton's 49th-minute penalty.
Nothing went right for Celtic with a mix up between Charlie Mulgrew and Fraser Forster presenting Sutton with the opener in the second minute.
Lennon had warned his players that the glory of their 3-0 win over Rangers was for the history books only and didn't spare their feelings yesterday.
"The players have had a lot of nice things said about them this week and maybe they are believing their own publicity," the Celtic boss admitted.
"We were second best. It's a criticism I can't level at the team very often, but Motherwell were the hungrier team.
"We'll see what kind of reaction we get against Rangers, but I'm sure we'll put in a better performance.
Right-back Mark Wilson twisted his knee yesterday which could give Mexican Efrain Juarez a start against Rangers on Wednesday evening.
Meanwhile, Maurice Edu claims Rangers have no interest in Celtic's results after closing the gap on their rivals to five points, with two games in hand.
The Scottish champions cruised to a 4-0 victory over St Johnstone yesterday but Edu, who claimed the decisive goal to send Walter Smith's men into the last 16 of the Europa League midweek, insists Rangers do not need to look elsewhere for motivation.
He said: "To be honest, we were just focused on ourselves. That's all we can do at this point."