Hampshire were frustrated as Alexei Kervezee’s unbeaten 65 underpinned Worcestershire’s innings on day one of the County Championship clash.
David Balcombe picked up two wickets for 26 but rain did not help matters at New Road.
Hosts Worcestershire closed the day on 175 for four.
The third session lasted just a solitary over before bad light and rain ended play.
Worcestershire captain Daryl Mitchell, who began the match averaging over 100 in division two this season, chose to bat upon winning the toss and hit the second ball of the match for four.
Opening partner Matt Pardoe got off the mark with a three and hit Matt Coles for four in the eighth over, each batsman adding a further boundary as 26 came from the first 10 overs.
But Balcombe struck as he had Mitchell dismissed for 12.
Pardoe and Tom Fell put on 29 in 10 overs before the former was trapped lbw by James Tomlinson for a patient 21.
Kervezee had scored 14 by lunch, with Fell on 15 as the interval came at 85 for two.
A short rain delay followed soon afterwards.
Balcombe then grabbed more glory as Fell was dismissed shortly after the resumption for 19, well caught by James Vince in the slips.
Ross Whiteley lifted Danny Briggs for six but Matt Coles got some revenge, trapping him lbw for 18 to leave the Pears 139 for four.
Kervezee reached 50 with a four off Briggs, his sixth from the 97th delivery he faced.
And he too cleared the ropes off the young spinner shortly afterwards.
He was 63 not out at tea, with Worcestershire 172 for four.
Unfortunately, that was it for the first day as bad light brought the players off the field one over after the resumption.
Rain then set in and after an inspection at 5.30pm, play was abandoned for the day.
Hampshire will hope for better luck today.