James Coles said it was a special moment doing his first first class 50 for Sussex.
Coles helped the home side rack up runs against Leicestershire at Hove.
But the bowlers face a tough task to take out the visitors, who dug in in the final session of day two of the championship fight.
Sussex amassed 588, the highest total in seven years.
The Foxes lost Hassan Azad to a slip catch from stand-in skipper Steven Finn on the first ball of their reply, but Rishi Patel and Louis Kimber fought with increasing authority in an uninterrupted stand that put them 159-1 on stumps.
They’re still behind by 429, but a slow pitch shows little sign of deterioration.
Coles, the 18-year-old, who made only his fifth first-class appearance, crossed 50 with a barrage of boundaries when No. 11 Sean Hunt offered his support in a 49-streak.
He said: “It’s a dream come true to get my first 50, especially here in Hove – my favorite place.
“I saw Hunty hitting the nets and I knew he was capable so I had great faith in him and the short limit I definitely targeted.
“Since we beat Derbyshire in our last game our confidence as a squad has really grown and it’s a really positive dressing room.
“The ball has started to reverse and there is also a turn so hopefully we can intervene early tomorrow.”
Coles landed at 59 after Oli Carter and Delray Rawlins each scored 75 points.
https://www.theargus.co.uk/sport/20274743.james-coles-makes-maiden-50-sussex/?ref=rss James Coles scores first 50th for Sussex