Hearts were beaten 2-1 by Manchester City in a friendly match at Tynecastle on Friday night.
Trialist Osman Sow cancelled out Scott Sinclair's opener but Aleksandar Kolarov grabbed the winner for the English Premiership champions from the penalty spot.
Dundee United began their Dutch tour with a 6-0 win over Winterswijk. Aidan Connolly scored twice for Jackie McNamara's men, with Brian Graham, Stuart Armstrong, Nadir Ciftci and an own goal completing the rout.
Falkirk drew 2-2 at home to Rotherham and Stranraer won 1-0 away to Shildon.