Century-maker Rehaan Edavalath and Oliver Halion were largely responsible for Worcestershire Academy totalling 332 all out on day one of the ECB Under-18 County Championship Group Two fixture with Gloucestershire at Stourbridge.
Opener Edavalath, who last month signed his first professional rookie contract at New Road, made his latest sizeable contribution in an excellent season by hitting 125.
He faced 158 balls in his three and a half hour innings and struck two sixes and 22 fours.
Halion, who hit a century last week against Cricket Wales at Abergavenny, struck 90 from 169 deliveries with one six and 12 other boundaries.
Worcestershire skipper, Ismael Mohammed opted to bat and the home side lost two early wickets before Edavalath and Ollie Walker (31) began a recovery during a third wicket stand of 64.
Edavalath and Halion then joined forces for the major partnership of the innings in adding 139 in 34 overs.
It was 220-4 when Edavalath was dismissed but Halion and Cameron Jones (42) added a further 55 for the sixth wicket before Worcestershire were bowled out in 86.2 overs.
When Gloucestershire launched their reply, Bilal Arshad made an early breakthrough in a total of 16-1 from six overs.
