Celtic's superb performances in the second half of the season continue, with a 4-0 win over Aberdeen on Sunday putting Celtic in the driving seat to claim the Scottish Premiership for a fourth successive season.
Goals from Jason Denayer, Leigh Griffiths, Gary Mackay-Steven and Stefan Johansen handed Ronny Deila's men a comfortable win, as well as a six point lead at the top of the table.
The victory was Celtic's eighth league win in a row, and came just days after being knocked out of the Europa League by Inter Milan.
Earlier in the season, Celtic's form was patchy, and it prompted former Bhoys striker John Hartson to blast manager Deila, who arrived as Neil Lennon's replacement last summer.
Hartson, who smashed 119 goals in 201 games for Celtic in a stunning five-year spell in Glasgow, told media back in October that Norwegian Deila was 'a laughing stock' - but appears to have changed his mind.
In an interview with Sky Sports earlier today, Hartson admitted that he was wrong about Deila, and even suggested that Celtic could win a domestic treble based on their recent 'invincible' form.
"Ronny Deila came in for quite a lot of criticism at the start of the season from myself and lots of the supporters and media but he’s turned it round to his credit and they’re playing some brilliant football at the moment," said Hartson.
"Without sounding disrespectful to the other teams nobody can get near them at the minute so the domestic treble is a real possibility. hey’re playing so well, they’re defending well, they’ve got attacking minded players who attack all the time. They can swap strikers in terms of (Leigh) Griffiths and (John) Guidetti and Kris Commons who is a fantastic player. The look unstoppable right now, they look invincible, they look unbeatable," added the Welshman.
Celtic are six points clear at the top of the table, and face Dundee United in both the quarter-finals of the Scottish Cup and the final of the Scottish League Cup - giving Deila a superb chance of winning the treble in his first season in charge.