Cardiff City hosts VFL Osnabruck and fellow German side St Pauli on the same day in the Osnabruck Tournament in Germany.
Cardiff's pre-season tour of Germany will continue with matches against VFL Osnabruck, FC St Pauli & VfL Bochum but the opener against RW Ahlen was moved then abandoned at half time.
Malone's exit with Richards coming the other way from Fulham saw the former Swansea full back Trollope's first Welsh signing, with it a move that should see him step up his career.
Cardiff City's pre-season friendly against RW Ahlen in Germany is moved because of a poor pitch and then abandoned at half-time.
Wales assistant manager Osian Roberts hopes Jazz Richards' move to Cardiff City from Fulham will kick-start the defender's career .
Cardiff City Stadium will host Wales' first three 2018 World Cup qualifiers against Moldova, Georgia and Serbia.
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As expected the arrival of Welsh international Jazz Richards from Fulham - with Scott Malone going in the other direction - was confirmed by Cardiff City earlier today.