Michael van Gerwen’s defeat to Daryl Gurney at the World Series of Darts Finals earlier this month has seen him fall down the PDC rankings.The Dutchman is now ninth in the world, falling from seventh.The PDC rankings are based on prize money accumulated over a two-year periodGettyAmid Van Gerwen’s slide, Danny Noppert and Josh Rock have risen above him.Unfortunately for ‘Mighty Mike’, his fall down to ninth represents his lowest ranking since 2012.Accelerating his slip in the rankings was Van Gerwen’s failure to retain his World Series of Darts Finals title.Van Gerwen went down 6-5 to Gurney to crash out in the opening round for just the second time at that event.And now that the money won from the Players Championship two years ago has dropped off his total, he is left behind Noppert and Rock.But all of that can change with the World Grand Prix coming up and plenty of prize money available, with the draw already complete.He is in action on opening night in Leicester as the players take on the double in, double out format.Van Gerwen starts off against Ryan Joyce.If he manages to beat the Geordie, Noppert or Niko Springer await.If it manages to be Noppert, and Van Gerwen beats his fellow Dutchman, he’ll be back above him when the rankings refresh.Van Gerwen’s form has been very inconsistentGettyWhat did Van Gerwen say after his World Series of Darts Finals exit?Whoever he faces, Van Gerwen will look to channel his frustrations from a disappointing World Series of Darts Finals campaign and deliver some much-needed results.“I don’t get it,” Van Gerwen said following his loss to Gurney.“I came back so well. I’m 3-0 down, and I think I throw 13, 13, 14, 15 and 13 darts.“In the last leg there’s absolutely nothing wrong. I just miss six darts. It makes no sense at all. I’m sick to my stomach.“That just can’t happen. Especially not that first visit.“You’re stuck on double 10 and you’re already making it very hard for yourself. I’m really absolutely gutted. Good grief. Totally unnecessary.”Van Gerwen’s last title this year came in JuneGettyYear to forgetThis year has been an uphill battle for Van Gerwen on the oche.During the Premier League, he only won one night, failing to make it to Finals Night.In the end, he finished sixth, which is the lowest he’s ever finished in the Premier League.Across the rest of the season, the three-time champion of the world has only won three titles.None of them have been a major, with two in the World Series of Darts before crashing out immediately on Finals Night.The other came during the Plyers Championship, but the World Grand Prix is a tournament he has mastered.Van Gerwen is a six-time champion in that event, so it could be what he needs to get his form back.