Heather Watson was one of the many players who commented on the controversial US Open women's final between Serena Williams and Naomi Osaka. The American player argued with the chair umpire, Carlos Ramos. Metro asked Watson who was right and who was wrong, but the British player struggled to give a verdict.

‘I’d say it was a grey area. It’s such a tough situation,' Watson admitted. 'It’s tough for her because she is obviously under a lot of stress and pressure at that moment and you have emotions and him as well, he has to make a decision on how it should be treated.

Some referees are stricter than others – another referee might have let it all slide. He made that decision that day. It’s not a nice thing to happen in a Grand Slam final, but mostly for the girl who won it Naomi Osaka.

She’s 20 years old, won her first Grand Slam title and all anyone is talking about is that.’ Serena has said many times that men and women get treated differently by umpires, but speaking about the coaching rule, Watson said: ‘I’ve had code violations before – it’s not an unusual thing to happen, it happens quite often.

And yeah, I’ve felt like when I’ve got one most of the time, I’ve deserved it. There are some rules that aren’t quite equal like the on-court coaching rule, which women have that men don’t so you can bring your coach on once per set.

There’s no reason why we should have that and the men don’t. I feel like there are things like that that need to change so we’re treated more equally.' ALSO READ: David Ferrer: 'It will be my last US Open. Facing Rafael Nadal is a gift'