Hibernian became the third team in Scotland to defeat Celtic this season, with their 2-1 win over Brendan Rodgers' men on Saturday pushing them closer to second-placed Rangers and third-placed Aberdeen.
Neil Lennon's side are only three points behind the duo heading into the last four games of the campaign.
“If we finish second, then how can we top that? If — and it’s still a big if," Lennon said concerning Hibs' chances, as reported by the Scottish Sun.
“I do think Rangers will be strong next year because they have a bit of clout behind them and they may or may not bring in a new manager.
“So this may be as good as it gets for us in the short-term anyway; but we will have to see.”
Rangers will go back to the drawing board at the end of the campaign in preparations for next season and, should they fail to finish directly behind Celtic this term, manager Graeme Murty could be relieved of his duties.
Winning a first Scottish Premiership title since 2011 remains top priority for the Ibrox club and, having failed to finish as best of the rest last term upon their return to the top flight, a lot of work is needed if Rangers are to mount a strong title challenge next term and going forward.
The recent signs are promising, though, with Rangers a better side under Murty, even though consistency remains an issue.
Should they get it right in the summer transfer window, Rangers can surely give Celtic a run for their money next season, but it remains to be seen if the team can get lucky making shrewd and quality signings like Alfredo Morelos.