|LV= County Championship Division One, Edgbaston (close, day one)|
|Sussex 280-3: Nash 112 not out, Wells 68|
|Warwickshire: Yet to bat|
|Sussex 2 pts Warwickshire 1 pt|
Sussex reached 280-3 at stumps on the first day of their Division One contest with Warwickshire at Edgbaston.
Chris Nash marked his 150th first-class appearance with a unbeaten 112 that included 13 fours and a six.
After the visitors had won the toss and chosen to bat first, opener Luke Wells (68) shared half-century stands with Matt Machan and Nash.
A wicket for 23-year-old leg-spinner Josh Poysden on his Championship debut was a rare bright spot for the hosts.
|Sussex on song against Warwickshire|
|Sussex are unbeaten in their last seven Championship meetings with Warwickshire, having won the last three clashes. Their win at Edgbaston last season ended a run of 22 away games against the Bears without a win.|
Sussex almost made it through the first hour unscathed before captain Ed Joyce (30) drove a Boyd Rankin delivery straight to Laurie Evans at gully, although Wells and Machan guided them to 90-1 at lunch.
Machan miscued to Chris Wright at mid-off shortly after the resumption to become Poysden's first Championship scalp, but Nash joined Wells to put on 66 for the third wicket.
Wells passed fifty for the third time in the Championship this season but was unable to register a second century in 2015, top-edging a pull shot off Wright to Rikki Clarke.
Nash made it to three figures for the first time this summer late on in the day, accompanied by Luke Wright, whose measured 43 not out helped to put Sussex in a strong position at the close of play.
Warwickshire spinner Josh Poysden:
"I only found out at the toss that I was playing. I was absolutely thrilled and honoured to make my red-ball debut for Warwickshire, having played just a few limited-overs games.
"It was an attritional day but I was pretty happy with the way it came out for me. I just love bowling. I have been nagging the groundsman Gary Barwell all season to prepare some turning wickets.
"Jeetan Patel bowled superbly. On another day he'll bowl like that and get a stack of wickets.
Sussex batsman Chris Nash:
"It has taken me 150 games to get to number four in the order. As I've opened the batting all my life I felt quite nervous going in lower down but I am chuffed to bits.
"It has been a tough season so far. We have played on some interesting pitches so to get a hundred in a big game for us was very satisfying.
"Luke Wright batted superbly and really showed his maturity. His century against Gloucestershire on Friday night was the best T20 innings I've ever seen so for him to switch down the gears and play like he did just shows what a fine player he is."