Dave reached the last 16 in Players Championship 9 at the Metrodome, Barnsley.
Chizzy finally lost out to Michael Smith after earlier wins over Mike van Duivenbode, Harry Ward and Matthew Edgar.
In Players Championship 10, Dave reached the last 32, suffering defeat to John Henderson after early victories against Darius Labanauskas and Jon Worsley.
Dave lost out in round two of the German Darts Championship in Hildesheim, Germany.
Facing Mervyn King in the last 32, Chizzy was defeated 3-6.
Dave won his second Pro Tour event of 2019 with a victory in Players Championship 7 at the Robin Park Tennis Centre in Wigan.
Chizzy defeated Daryl Gurney 8-6 in the final after victories over Davy van Baelen, Ritchie Edhouse, Stephen Bunting and Rob Cross saw him into the last eight. There he defeated Vincent van der Voort, and followed up with a win over Mark McGeeney in the semi final.
It was a case of "after the Lord Mayor's show" in Players Championship 8 however, as Dave lost out first round to Keegan Brown.
Dave reached the last 16 of the European Darts Open in Leverkusen, Germany.
Chizzy recorded a 6-2 victory over Ted Evetts in round two to make it through to the final day of competition, but he was defeated by James Wade in the following match.