Southampton boss Russell Martin says James Ward-Prowse leaves St Mary's with an 'incredible legacy.'
The 28-year-old midfielder is set to complete a £30m move to Premier League side West Ham pending a medical.
"We will miss him on-and-off the pitch," Martin told BBC Radio Solent.
"We had a really good chat, he is emotional about leaving and that shows how much he cares and how difficult it will be for him - I think he would have liked it all to end differently."
Club captain Ward-Prowse has been with Southampton since he was eight years old and he has made more than 300 appearances for them and scored more than 50 goals in all competitions
Last season he played 46 times and netted 11 goals under three different managers at St Mary's.