The British player Cameron Norrie doesn't think that the differences in terms of prize money between singles and doubles are fair. Through Twitter, Norrie praised Jamie Murray's mixed doubles title won alongside the American Bethanie Mattek Sands.

'He takes $75,000 of prize money - Djokovic and Delpo playing for $3,800,000 tomorrow. Bizarre', Norrie wrote. 'More love for dubs.' In press conference, Jamie spoke about the influence of his mother Judy who contributed to bring his two sons, Jamie himself and Andy, to the top tennis level. 'I think her journey was basically she loved tennis.

Her parents loved tennis', Jamie recognized. 'She wanted to be a professional tennis player, I guess. But it was very difficult in Scotland at that time with opportunities and kind of access to facilities, things like that.

I think when she became a coach, she wanted to give as many kids as she could the opportunities she didn't have when she wanted to be a player. I think she did an amazing job, not just with us, because she was national coach of Scotland for however many years.

Now she's got so many different initiatives with young kids, not just Scotland but the UK. I think it's pretty remarkable how many kids she's brought tennis to in our country. She'll continue to do that. A lot of the stuff, people don't write about that stuff because they're not really aware of it.

But it's pretty incredible what she's been able to do. Obviously like me and Andy, we've done some pretty amazing things on the tennis court, considering where we've come from. But actually what my mum has been able to do is almost bigger in the grand scheme of things, I think.' ALSO READ: Mats Wilander: 'Rafael Nadal is human, hard courts are not good for him'