 He signed a new four-year contract in August 2014 and was also the club's top goalscorer for the 2014–15 season, with 21 goals in all league and cup matches.On 31 August 2016, Martin joined Fulham on a season-long loan, with an arrangement for a permanent deal at the end of the loan spell.This arrangement was disputed during the season, as Martin expressed a desire to return to Derby.