Wales fly-half Dan Biggar must stop moaning to referees so vociferously, says former captain Martyn Williams.
Biggar, 28, frequently complained to Glen Jackson in Wales' Six Nations loss to Ireland, notably that he was tackled in the air in the second half, which led to the home side's third try.
"It is something he has to take out of his game," Williams told BBC Scrum V.
"Senior players have to say '50-50 calls might go to the other team because you constantly complain'."
Williams added: "He is one of the senior players. They have to pull him aside and say 'Dan you are killing us here'.
"Referees are human and if someone is into you all the time you don't get the calls. For 60 minutes of that game he did not stop complaining.
"At this level that is unacceptable, you can't be complaining all the time. If he is going to penalise Ireland he is going to penalise Ireland, whether you throw your arms in the air or not.
"We are all competitive and all want to win but the best 10 you have ever seen, [former New Zealand fly-half] Dan Carter, is the coolest guy you will ever see."
'You can't take one thing without the other'
Speaking at a press conference on Tuesday, Ospreys backs coach Gruff Rees said: "I know Biggs well and sometimes it is that competitive spirit and you can't take one thing without the other.
"Dan will probably admit he has to get on with certain things, but there's probably other aspects of that game, which not just Dan, may have got under the skin of some of the Welsh guys and you do react to those sort of things, but they'll have no complaints and know they must get on with the game."
Ospreys back Biggar returned to Wales' team to face Ireland after missing the first two rounds of the Six Nations with a shoulder injury.
Scarlets fly-half Rhys Patchell started both games in his absence, impressing in the win against Scotland but struggling in the loss to England.
Former British and Irish Lions flanker Williams, who won 100 caps for Wales, sympathised with Biggar after a difficult afternoon in Dublin that saw his side starved of possession.
"It is difficult to critique his game because he did not have any ball," the ex-Cardiff Blues player added.
"I was one of those who thought, yes, put Biggar in against Ireland going to Dublin. I thought it would be perfect for him."
Former Wales fly-half Jonathan Davies echoed Williams' sentiments about Biggar's complaints to referees.
"If you are a 10 you are chirpy and if you have a word with the referee you say it in a nice way," he said.
"You put doubts in a referee's mind but not by moaning.
"Anybody who would have played outside-half against Ireland would have not made a bit of difference."
'I want Patchell to play'
While Williams had advocated Biggar's recall against Ireland, another former Wales captain, Gwyn Jones, would like to see Patchell play against Italy on 11 March.
"Dan Biggar did exactly what Dan Biggar does. He was good in the air, competitive and complaining far more than he should have," said Jones.
"Does he look like he brings a threat to our backline? No.
"I want Patchell at 10 because he has played well for 18 months at 10 and [Gareth] Anscombe has played well for 25 minutes. I think Patchell deserves another chance."