Michael van Gerwen says it's been "terrible" watching long-time pal Vincent van der Voort struggling for form and confidence. Mighty Mike, 34, faced Van der Voort, 48, at the Dutch Masters last month, and smashed him 6-1. READ MORE: Michael van Gerwen brutally insists playing Luke Littler 'isn't special' after Berlin triumphREAD MORE: Darts star Vincent van der Voort hints at retirement as he 'doesn't enjoy it anymore'"I think it's terrible to see him like this," Van Gerwen said. CLICK HERE TO JOINBack in May, Van der Voort hinted at retirement, saying: "Now I am dropping in the world rankings. It comes after Van Gerwen returned to top form by clinching victory on Night 2 of Premier League Darts.