The Stamford Bridge boss appeared to be upset by the line of questioning over the absence of Kevin De Bruyne from the squad and walked off the podium to leave Frank Lampard to field further journalist queries.
And while Chelsea are preparing for their game in Romania, on-loan striker Romelu Lukaku was spearheading Everton's win over Newcastle United to prompt questions over why the Belgian was allowed to leave the club this season.
Manchester United manager David Moyes will be financially backed in the January transfer window after a disappointing start to the Premier League season, but he has also received support from the last man to succeed a legend at the Old Trafford helm.
But who else is making the headlines in Tuesday's papers? Read on to find out more.
Mourinho abruptly curtailed his press conference after being asked about the omission of De Bruyne from his squad for the game against Steaua, reports Martin Lipton of the Daily Mirror among others.
Mourinho answered just six questions before leaving Lampard as the sole Chelsea representative at the press conference.
Meanwhile, Chelsea striker Lukaku will prompt further uncomfortable questions for Mourinho after helping Everton to a 3-2 win over Newcastle on Monday.
The Belgium international was cleared to join the Goodison Park club on transfer deadline day, and Ian Ladyman of the Daily Mail believes Mourinho will now be wondering whether he made the right decision.
Manchester United manager Moyes will be handed a £50 million war chest in January to bolster his squad after a poor start to the season, reports David McDonnell of the Daily Mirror.
United have stuttered since Moyes replaced Sir Alex Ferguson at the Old Trafford helm and are currently 12th in the table.
But United owners, the Glazer family, recognise that the Premier League has become more competitive this season, claims McDonnell, and will give the former Everton boss what he needs financially in January to ensure the club do not miss out on Champions League qualification.
Meanwhile, Moyes has received support from the last man to follow a legendary United boss into the hotseat.
Wilf McGuinness, who failed to replicate the successes of Sir Matt Busby after taking over in 1969, has backed Moyes to turn United around in an interview with Martin Blackburn of The Sun (subscription required).
Cross claims the comment is a swipe at Mourinho, who is a long-time adversary of the former Liverpool boss ahead of the Champions League tie between Arsenal and the Serie A side.
But Benitez is fascinated at the way the Premier League is unfolding this season.
I'm expecting a strong team because I think Arsene Wenger is the best coach in the Premier League. They signed good players, at this point everything going well for them.
Arsenal have a great manager, Liverpool continue growing, they are doing well. Other top sides are not at their level with new managers at the moment so it will be a question of time to see if five or six teams will be more or less the same.
The Uruguay international voiced his desire to leave Anfield during the summer but decided to stay with the Merseyside club before the transfer window closed.
Suarez made his return to Premier League action in the 3-1 win at Sunderland on Sunday, and Gerrard is relieved the forward has remained with the Reds.
Every day I was waking up hoping nothing would happen and he would still be here.
When you have a player as good as Luis, you know the big clubs are going to want him.
Nobody tried harder than me to keep him at Anfield and he knows exactly what I think of him. I knew if we could keep him here, the better our chances would be.
It’s a credit to Luis for the way he has bounced back from a difficult summer.
Meanwhile, Liverpool have been linked with a move for Racing Club forward Luciano Vietto, along with Manchester City, Real Madrid and Juventus, reports Graeme Yorke of the Daily Mail.
The Craven Cottage boss has won just one point from the last seven home games, and Cross names Martin O'Neill, Gus Poyet and Rene Meulensteen as possible replacements.
Tottenham manager Andre Villas-Boas may have to play striker Emmanuel Adebayor more often to ensure the club receive a bigger fee for his services in the future, claims Darren Lewis of the Daily Mirror.
Steve McClaren has been appointed as the new manager at Derby County to succeed Nigel Clough, and his first move could be for Manchester United defender Michael Keane, reports Alan Nixon of the Daily Mirror.