RONNY DEILA believes the bounce-back-ability of his Bhoys is a major factor in their surge for a domestic Treble.

And the Hoops boss got further proof of this at the weekend with the 4-0 demolition of nearest title challengers, Aberdeen.

The crushing win came less than 60 hours after they had returned from a bruising defeat to Inter Milan in the San Siro.

Despite the fact they had played for an hour with just 10 men, they put the exhaustion and disappointment behind them.

In fact, it was the sixth consecutive time Celtic have won their weekend game after playing in Europe.

In the six games they previously played after European ties this season, they won only once.

Deila believes that massive improvement franks his believe they have the steel required to make their pursuit of the club's first Treble since 2001 successful.

"It is a lot about the fitness and the mentality of the players," said the Celtic manager as he prepared to send them out again tomorrow night, to face St Johnstone in the league match postponed from January when the Hoops went on a mid-season break to Gran Canaria.

Deila reckons the benefits of that time away together is now being seen and said: "We are good at switching on again and being focused, always ready for the next game.

"We don't dwell on what has happened more than we think about what is coming up."

Which is one reason they have already moved on from going out of the Europa League.

Had they progressed to the Last 16, they would have played their first leg tie next midweek - between their Scottish Cup quarter final tie with Dundee United on Sunday, and the League Cup final against Jackie McNamara's side the following weekend.

Now, they will have the opportunity to enjoy some recovery time before heading to Hampden where they hope to collect their first silverware under Deila.

Captain Scott Brown is already proving to be a key figure in this pivotal month of the campaign.

So Deila will be relieved to discover the midfielder is not about to serve a league suspension - despite picking up his sixth yellow card at the weekend.

Half a dozen cautions triggers a one-game ban.

But, because Brown's first two yellows came in the win over Aberdeen at Pittodrie in November, they do not count in the totting up as he already served a ban in the next league match.

So, it would take another two cautions for Brown to be suspended again in the league.

He proved he has the discipline to walk an even finer tightrope after he picked up bookings against Salzburg and Atra Giurgiu in the Europa League Group Stage, but avoided a ban by not seeing yellow again in any of the other four ties he played, including last week's tousy affair in the San Siro.

If he does pick up a league suspension, Deila is confident the team is functioning well enough to cope.

The manager said: "It should not be a problem if we have to lose his inspirational influence for a short while.

"But, of course, he is a good player, and we want to have him on the park all of the time.

"He maybe does need a rest, as well.

"But, we have good players who can come in and give a good performance, if he is missing."