Cologne ATP results on Monday: Men's singles 1st round Oscar Otte (GER) bt Jan-Lennard Struff (GER x7) 6-4, 6-3 Radu Albot (MDA) bt Pierre-Hugues Herbert (FRA) 6-2, 4-6, 6-4 Hubert Hurkacz (POL x6) bt Marc Polmans (AUS) 6-2, 7-5 Mischa Zverev (GER) bt John Millman (AUS) 6-1, 6-4 afp