Swansea City manager Carlos Carvalhal has lost only once in eight matches since being appointed at the Liberty Stadium on December 28 and victory against Arsenal took his side out of the relegation zone.
He's just the latest example of how changing managers midway through the season can work.
Whether you have a positive impact from the first day like Leicester's Claude Puel or Sam Allardyce at Everton, or build a successful pathway over weeks, as Roy Hodgson and David Moyes have done at Crystal Palace and West Ham.
Sportsmail assesses the Premier League clubs that have decided to change managers this season – and how their new man has done.