Rangers played out a 2-2 draw with Partick at the Firhill Stadium in the Scottish Premiership.
The home team ended the game with 10 men due to the dismissal of Chris Erskine midway through the second half.
The Gers headed into the match as favourites, with Partick fighting for survival in the Scottish Premiership.
Pedro Caixinha’s side’s performance was not great, and their failure to pick up all three points from the match must have come as a huge disappointment to the team as well as the fans.
Former Celtic striker Hartson was following the match, and he has praised Partick for picking up a point from the match with 10 men.
The former Arsenal and West Ham United man has also mocked Rangers manager Caixinha for his comments about his squad earlier this season.
Back in August, Caixinha reiterated his claim that Rangers have the best squad in Scotland, as quoted by The Daily Mail.
Best squad in Scotland— John Hartson (@JohnHartson10) September 15, 2017
Well done the 10 men!!— John Hartson (@JohnHartson10) September 15, 2017