Worcestershire face a tough challenge on the final day if they are to avoid defeat against Nottinghamshire in their day-night pink ball Specsavers County Championship match at Trent Bridge.
Set to score an improbable 462, from a minimum of 113 overs, they reached the close of the third day unscathed on 43 without loss.
They have been set a challenging target after Jake Libby had fluently progressed to the fifth century of his career.
The 25-year old opener reached the landmark from 144 deliveries, with six fours, at which point the hosts declared their second innings closed on 249 for four.
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T20 returns to Trent Bridge on 4 July with a 2017 Finals Day rematch of Notts Outlaws v Birmingham Bears. Tickets are £10 in advance for adults, £7 for over-65s & under-21s and £5 for under 16s. Secure your seats now.