Denly highlighted his potential on the England Under-19 tour of India at the start of 2005 when he was undoubtedly the tourists' best performer.
England's batsmen struggled throughout the tour but Kent youngster Denly was the exception and made a half-century in all three Tests, including a top score of 81 in the third Test.
He also impressed in the one-day series, making 71 in the third ODI as England won their only match of the tour and followed it up with 80 in the next game.
Denly has played for Kent at all age levels and made his first-team debut in 2004 against Oxford UCCE.
He previously represented England at Under-17 level and went on the ECB Under-18 tour to the Netherlands in 2003.
He featured in all the under-19 internationals in the summer of 2005 and made several valuable contributions as England won the Test and one-day series against Sri Lanka without defeat.
Denly made his Frizzell County Championship debut against Gloucestershire at Maidstone and also made six totesport League appearances.
He was given an extension to his contract with Kent at the end of the 2005 season.
Excellent domestic performances in the 2007 season, in which he scored 902 championship runs at an average of 41, saw him called up for the England Performance Programme in the winter of 2007-08 and the subsequent England Lions tour of India.
Denly endured a shaky start to the following first-class season, but his class shone through in the limited overs formats.
He bounced back to form in the LV County Championship with 149 against Somerset.
And he was the outstanding batsman in the Twenty20 Cup. 451 runs, five fifties and a top score of 91 saw Denly become one of the most valuable performers in the format.
His runs carried the Spitfires to two finals, though uncharacteristic failure in the Friends Provident Trophy final with Essex saw Kent complete the season empty-handed.
Denly's stock continued to rise and he was named in the Performance squad that travelled to India in November 2008.
More consistent performances in 2009 earned him a senior one-day debut against Ireland in Belfast, when he struck 67.
His Twenty20 international bow followed but a freak knee injury in training ruled him out of the first three ODIs of the NatWest Series against Australia. He returned for the remainder of the rubber and struck 53 in the seventh match, at the Riverside.
Denly helped England reach the semi-final of the Champions Trophy in South Africa and was a member of the limited-overs squad and EPP for the subsequent tour of the same country.
Denly lost his one-day place following the Champions Trophy and also his T20 spot after the series with Pakistan in Dubai during February 2010.
His domestic form suffered somewhat and, following a mixed 2011 that included a career-best 199 versus Derbyshire in the championship, he left Kent for Middlesex.