For Sam Hutchinson, the prospect of stepping out at Stamford Bridge brings to mind one word. 'Closure,' he says.
Hutchinson was at Chelsea from the age of seven to 24. At one stage there were comparisons to John Terry. At another he was retired from the game suffering profound mental problems.
In 2010, Hutchinson called it a day because of unrelenting pain in his right knee. A spell in the Priory followed.
However encouragement from Ryan Bertrand persuaded Hutchinson to try again, and after an 18-month lay-off he returned to play twice more for Chelsea in 2012. He was also in the travelling party that May when the club won the Champions League, and has one of the rings Didier Drogba had made to commemorate the triumph.
He has not been back to Stamford Bridge since leaving for Wednesday in 2014, so Sunday will carry great meaning. 'I cannot wait,' Hutchinson says. 'It will be a closure.'
Hutchinson has established himself as one of Wednesday's best players, now a committed midfielder with a touch of quality, making more than 100 appearances for the club. He could not have envisaged such a future during his dark days at Chelsea.
'When I retired through injury, I suffered with mental health issues and had to go to the Priory for a long time,' he says. 'I was severely depressed.' His wife Jennifer helped pull him through.
'I was horrendous,' he adds. 'I didn't speak to my mum and dad for a year and a half. It was just me and my missus.
'I used to record Homes Under the Hammer, wake up at 2 o'clock and sit watching it under a blanket. She'd come in from work and be like, "What are you doing with your life? You need to start playing football again". She knew how much I loved it.'
It had been a huge decision to give up the game in the first place. 'The pain was continuous,' he says. 'When it started after games it made me feel sick. Then it gets to being a drain on you. I was worn out, completely gone.'
Hutchinson stayed at the club, working for Chelsea TV and as a mentor to young players, before he was persuaded to try again.
He explained: 'Jon Fearn, the physio, and Ryan Bertrand, were doing a session in the pool and they said, "You should try because you look fit again."
'Brian English, who is the doctor at Middlesbrough now, said, "Do you want to try some running with Darren Campbell?" We started doing it and six months later I was back in the first team. It was rest, sorting my head out, changing my running gait, a bit of everything.'
Hutchinson says he still has bad days but now possesses the tools to cope, aided by his three children, Arnie, Albie, and Mila. Along with Jennifer, they will be in alongside 6,000 Wednesday fans at Stamford Bridge.
Hutchinson is looking forward to a reunion with Eden Hazard, David Luiz and Gary Cahill, but he also wants a result. Asked what victory would mean, he says: 'Everything.'
