Andy Murray's mother Judy has hit back at a fellow Twitter user for questioning her tennis coaching abilities.
The mother of the Wimbledon champion is currently in New York supporting her son as he attempts to defend his US Open title.
A Twitter user under the name @tyBadman wrote: "Is that Judy Murray commentating on US Open? Apart from giving birth to Andy Murray, how again does she qualify to be a coach?"
Judy responded with: "I've been a coach for 20 years. Two Grand Slam champs. Two junior Slam champs. Thirteen British junior champs. GB women's team captain. Enough?"
After receiving Judy's message, the user swiftly apologised.