Djokovic had breezed through to the last four without dropping a set as he chased more glory to end his remarkable year. adidas neo retro UK Open winner James Wade, Grand Slam champion Jose de Sousa, Michael Smith and Dave Chisnall are also heading to Amsterdam from the PDC Order of Merit not already invited, while reigning champion Gerwyn Price, four-time winner Michael van Gerwen, Peter Wright and history-maker Fallon Sherrock were among the eight players invited prior to the World Grand Prix. adidas neo retro Please use Chrome browser for a more accessible video playerNEIL PICKS: Chiefs adidas neo retro Winston had to be helped to the sideline after being unable to walk off by himself. He was then carted back to the locker room.Trevor Siemian replaced Winston. adidas neo retro