A neighbour has claimed Isidro Garcia "was always watching" his captor from a window whenever she left the house.
Maribel Garcia said it appeared that the woman - who was kidnapped by the 41-year-old 10 years ago - "knew she had to do what he said".
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The win sends the Scot through to the last eight where he will face either Japan's Kei Nishikori or France's Richard Gasquet.
People "would not want" international footballer Jerome Boateng as their neighbour, according to a German politician.
The paralympian posted a time of two minutes and 57 seconds on Sunday.