De Sousa landed a timely 180 and 57 checkout to see off Bradley Brooks 6-4, with 'Bam Bam' sat waiting to send it to a decider. He will now face Danny Noppert after also producing a 98 average and a finishing percentage of 60% in seeing off Brooks.
Tournament Centre 2023 Czech Darts Open: Schedule of play, results, TV Guide and prize money breakdown
While in the case of Van der Voort, he snapped a poor run of form seeing off Jamie Hughes 6-1 in a superb win for 'The Dutch Destroyer'.
Van der Voort surged ahead with a 61 finish and a 12-darter for a 12-darter for a 2-0 lead. A second break then followed in the third leg, before 'The Dutch Destroyer' brought the margin to four with a 53 check-out.
In the fifth leg, Hughes finally got on the scoreboard, but Van der Voort then immediately made it 5-1 by throwing out 50. He finished it off with a 17-darter, allowing him to take on Andrew Gilding in the second round.