West Ham co-chairman David Sullivan is recuperating after undergoing heart surgery on Tuesday.
Sullivan, 67, underwent what the club confirmed was a minor, routine procedure.
His son David Jnr tweeted a picture of his father lying in his hospital bed and using his mobile phone as he recovered from the operation.
Dads just had heart surgery woke up from operation and is straight back on the phone to sign more players ufffdufffd pic.twitter.com/4bXSDsMV8N
- DAVE SULLIVAN JNR (@DaveSulley) 23 August 2016
In the tweet, he went on to suggest his father was already back to negotiating the arrival of new players at West Ham.