Nijman got better as the qualifier went on going from an 83.5 average during his 6-0 win over Thomas Lazic up into the 90's before seeing off Mike de Decker 6-5 with a 101 average.
Rosenauer saw off Gabriel Rollo, Berry van Peer, Jurjen van der Velde and Wilco Vermeulen en route to qualifying himself.
Both will now join the line-up in the final event of the European Tour season which takes place from September 27-29.
Click here for more information about the PDC European Tour, including the format, calendar and the prize fund breakdown.
Semi-Finals | ||||||
92.3 | Rosenauer, Michael | 6 | - | 1 | Vermeulen, Wilco | 83.2 |
101.3 | Nijman, Wessel | 6 | - | 5 | De Decker, Mike | 90.3 |
Quarter-Finals | ||||||
84 | Vermeulen, Wilco | 6 | - | 2 | Puls, Marko | 67.7 |
85.4 | Rosenauer, Michael | 6 | - | 5 | van der Velde, Jurjen | 80.7 |
83.3 | De Decker, Mike | 6 | - | 4 | Roelofs, Owen | 82 |
90 | Nijman, Wessel | 6 | - | 2 | Kniest, Jens | 77.3 |
Top 16 | ||||||
85 | Puls, Marko | 6 | - | 4 | Beger, Robin | 77.2 |
84.4 | Vermeulen, Wilco | 6 | - | 1 | van Trijp, Danny | 84.2 |
79 | van der Velde, Jurjen | 6 | - | 2 | Akhtar, Dennis | 71.5 |
93.3 | Rosenauer, Michael | 6 | - | 2 | van Peer, Berry | 84.6 |
82 | Roelofs, Owen | 6 | - | 4 | Eidams, Rene | 80.3 |
94.8 | De Decker, Mike | 6 | - | 3 | Bilderl, Manfred | 87.5 |
81.1 | Kniest, Jens | 6 | - | 5 | Knopf, Kevin | 80.8 |
90.4 | Nijman, Wessel | 6 | - | 3 | Portela, Diogo | 83.8 |