Kamil Majchrzak defeated Benjamin Lock 6-3 6-2 in the POL vs ZIM round robin on hard.
Majchrzak K. took it in straight sets.
Kamil Majchrzak beat Benjamin Lock 6-3 6-2. Umpiry, "Kamil Majchrzak vs Benjamin Lock — POL vs ZIM Round Robin", https://umpiry.com/match/2018-04-07/lock-vs-majchrzak-pol-vs-zim-rr?utm_source=cite (as of 7 April 2018).