The Spaniard enjoyed a bogey-free round at the Golfclub Munchen Eichenried while Australia's Wade Ormsby carded an eight-under 64 to take the overall lead, one ahead of Thomas Detry of Belgium.
Garcia, who was joined on 66 by Thorbjorn Olesen of Denmark and Dutch player Joost Luiten, started on the 10th hole and birdied the 11th, 16th and 18th to turn in 33.
A beautiful approach to the fifth set up another gain before the Spaniard took advantage of the par-five sixth and then put his tee shot to the par-three eighth to close range.
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