Chelsea boss Jose Mourinho returns to his homeland for Champions League action... but there's no hero's welcome in Porto

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No-one in Porto, least of all Iker Casillas, will have been too shocked to find Jose Mourinho brooding and at odds with his Chelsea players as he returned to a city he once called home.

They are familiar with the turbulence of life with Mourinho, who is competing at the Estadio do Dragao for the first time for more than eight-and-a-half years.

No great fanfare is anticipated for the manager who led Porto to unlikely Champions League glory in 2004. There is plenty of respect for his achievements, just no great affection. 

Jose Mourinho is back in Porto ahead of Chelsea's Champions League clash at the Estadio do Dragao

Mourinho will be reunited with Iker Casillas - a player he fell out with during his time at Real Madrid

There is a statue of him inside the club museum, flanked by Sir Bobby Robson and Andre Villas-Boas, two coaches who are truly cherished in these parts.

Mourinho looked inside the museum on Monday night, and nodded his approval. After the scale of his achievements, he may expect more reverence, but this game is being trailed on national TV channel RTP1 as his reunion with Casillas.

‘No problem,’ said the Chelsea boss, when asked about Casillas. ‘I will greet him before the game and after. That’s it. No more questions.’

Even so, Portugal is gripped by the Real Madrid feud which became a Spanish soap opera, rather than by any emotional homecoming.

Cesar Azpilicueta and John Terry train ahead of Tuesday night's Champions League clash against Porto

Casillas (middle) and his Porto team-mates train on the Estadio do Dragao pitch on Monday afternoon

Terry does his best to bring the ball down during a Chelsea training session on Monday morning in Surrey

Diego Costa will be available for Chelsea and is expected to start for the west London club in Portugal

Casillas will add to the sense of occasion by making his 152nd appearance in the Champions League, overtaking Xavi Hernandez to set a new record.

The game is a tangle of sub-plots. Diego Costa starts up front after a domestic ban and UEFA caused a stir by appointing a Spanish referee with a reputation for leniency, known to be a personal favourite of Mourinho.

‘He can have the friends he wants, I don’t care,’ shrugged Porto boss Julen Lopetegui, a former Spain international and Real Madrid goalkeeper like Casillas, who also played at Barcelona when Mourinho was on the coaching staff at the Nou Camp.

Chelsea’s problems, however, are more basic. More dropped points at Newcastle and the latest withering critique from their manager dominated preparations in Portugal. 

‘We have no problems physically,’ said Mourinho. ‘Tactically it’s the same. Clearly it’s the attitude perspective of some individuals. And when you have individuals with that unstable attitude in terms of motivation, desire and commitment you will pay.

‘Generally I am happy and positive. They fight and want to improve, but we have some players who you want more from. I look for consistency. If not we become a Newcastle.

‘When Newcastle play Chelsea they play amazingly well, but when they play other teams they don’t play so well. This happens with most teams with an objective to stay between eight and 16th in the league.

‘They win today, draw tomorrow, three points here, one point there. But when you want to be a big team and you want to win you have to be consistent in your attitude.

Porto's head coach Julen Lopetegui is not worried about any potential leniency from the referees on the night  

‘There are two sorts of champions. There are champions who win something — and there are lots of them — but there are champions who during their career win one, two, three, four, five, 10 or 20 titles.’

Having won the Premier League in May, Chelsea have taken eight points from their first seven games. Mourinho said: ‘We have 25 champions from last year, but how many serial champions do we have? John Terry, John Obi Mikel, Branislav Ivanovic: almost every season they have something in the pocket.

‘I can be five or 10 years without winning a title, but I will still be a serial champion in my approach and my attitude. This is the problem we have at this moment.

Casillas watches the ball during a training session ahead of his reunion with Mourinho on Tuesday night 

Costa is put through his paces during training ahead of his return to action following his domestic ban

‘I don’t demand that they’re champions every season. In this country that’s impossible, especially at Chelsea, because when we win the title it’s the end of the world and nobody is happy. But you can be a serial champion in your attitude. For me that’s just the point.’

Mourinho tried to shake his players from their comfort zone by dropping four of them for the 4-0 Champions League victory at home to Maccabi Tel Aviv.

They won against nine-man Arsenal and Walsall of League One but after rescuing a point at Newcastle, the manager said six of the team were below standard.

Eden Hazard (left) speaks with a coach next to Costa during Monday morning's training session in Surrey

Mourinho did not name names, but said: ‘We are in an open situation. It is difficult to win the Premier League and Champions League, but possible. But if the season goes in one direction and becomes closed, and we can’t win, I will go just with the kids.

‘It makes no sense when you have nothing to win to play the older players. I’ll play the players we’re waiting for instead. I can arrive in a moment where I will look to the kids and say: ‘‘Let’s go, non-stop’’. I am ruthless.’

Porto can vouch for that. So can Iker Casillas.