Tour match, Hove, day one of four (stumps): Sri Lanka 283-4 v Sussex
Sri Lanka's Upul Tharanga hit his second century of their England tour, against Sussex at Hove.
Tharanga hit 10 and 52 in the opening Test at Lord's
The tourists were 283-4 after day one of the four-day encounter, Tharanga taking five hours over his 140.
Michael Vandort, dropped as opener for the first Test, made 44 at number three and there was an unbeaten 45 from in-form captain Mahela Jayawardene.
Sussex rested most of their senior players but were skippered by former England seam bowler James Kirtley.
The 20-year-old's five-and-a-half-hour stay ended shortly before the close when he mis-timed a pull off Luke Wright to mid on.
Tharanga displayed considerable concentration throughout his 252-ball innings, during which he struck 18 boundaries.
He had shared in an opening stand of 73 in 18 overs with Jehan Mubarak when Mubarak holed out to cover off Sussex debutant Tim Linley.
Vandort, the only change to the top six Sri Lanka fielded for the first Test, enjoyed a let-off on 39 when Carl Hopkinson failed to hold a chance at backward point.
But his innings was ended just before tea when left-arm spinner Chris Nash, playing his first first-class match for a year, trapped him leg before attempting to sweep.
Fast bowler Duncan Spencer, sharing the new ball, claimed his first success by having wicket-keeper Kumar Sangakkara caught low down at backward point.
Jayawardene moved comfortably into his stride and lifted spinner Ollie Rayner - another player making his debut - high over mid-wicket for six.
Veteran Sanath Jayasuriya was left out of the team despite being persuaded to come out of Test retirement and fly to England by Sri Lanka's new selection panel.
His non-involvement does not, however, mean that he is out of contention for next week's second Test against England at Edgbaston.
"Sanath is a part of our plans depending on the conditions going into the second and third Tests," said coach Tom Moody.
"We are working very hard with a young and exciting squad in a transitional period.
"As long as we are patient and show faith in these young players the future of Sri Lanka cricket is in good shape."