Mirka Federer was there supporting her husband Roger Federer as he played against Novak Djokovic in an intense five-hour game in the men’s finals on Sunday.

Although Roger didn’t end up going home with another grand slam  title under his belt, many fans were distracted by Mirka’s impressive engagement ring, which has reportedly  been upgraded from her original  ring.

The stunning piece of jewellery is believed to be a one-of-a-kind design from a Brazilian jeweller H. Stern, according to  Harper’s Bazaar.

The emerald-cut diamond ring is encircled by a snake-like band which is covered in several smaller diamonds in a white-gold or platinum setting.

The current style is definitely an upgrade on Mirka’s original ring, which was a  smaller emerald-cut diamond.

The mother-of-four attracted attention by taking her children along to see their dad play in the men’s finals.

The couple’s nine-year-old twin  daughters, Myla and Charlene are the oldest, while their four-year-old twin  sons Leo and Lenny  were also there to watch dad and cheer him on.

The intense match between Roger and Novak Djokovic went on for a staggering  five hours, and BBC  commentator Andrew Castle switched the conversation to Mirka’s ring, according to  The Sun.

He said: “Doesn’t look like costume jewellery, does it, on the finger?”

Tennis fans were quick to blast him as Castle had made remarks previously as to how much the men’s finalists earn.

Scroll through the gallery above  to see the ring as well as the lovely Federer children in the crowd cheering on their dad, Roger.