Derby County and Aston Villa are said to be interested in Chelsea's 18-year-old defender who is already a full Wales international.
Derby County need to bolster their wide options this January.
Aston Villa ran out 3-0 winners against Derby County at Pride Park on Saturday.
Derby County manager Frank Lampard says that Jack Grealish was right to ignore reported interest from Tottenham Hotspur and sign a new contract with Aston Villa.
Derby County face Aston Villa at home in the Championship.
Championship duo Aston Villa and Derby County are both reportedly interested in signing Chelsea's Premier League youngster Ethan Ampadu.
Aston Villa assistant John Terry reportedly recommended Jack Marriott to Derby County manager and his former Chelsea teammate Frank Lampard.
Derby County’s Duane Holmes made his first league start for the club against Birmingham City Saturday.
Derby County’s Jack Marriott was also linked with West Bromwich Albion and Leeds United.
Over the last month, I have given my views on the seven greatest attacking trios and back fours in football history, and to be honest, I was pretty happy with both.