Harvey Hosein hit 91 not out on a fourth-successive rain-hit day in Swansea as Derbyshire drew with Glamorgan.
The wicketkeeper-batsman found a return to form batting alongside captain Billy Godleman (227) as Derbyshire declared on 598-5, with a lead of 204.
Nick Selman made 70 not out for the hosts as they remained relatively unscathed in their final innings, closing on 184-2 when the two teams shook hands on a draw.
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