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.
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.