Feels like old times: 9 thirty-somethings make their way to second week of Wimbledon

What a year it's becoming for the thirty-something crowd at Wimbledon.

Led by 31-year-old Serena Williams and 35-year-old Tommy Haas, nine of the 32 players remaining at the year's third Grand Slam are 30 or older.

That's the most in the round of 16 at a Grand Slam since the 1977 Australian Open and ties the Wimbledon record in the open era, first set in 1975.

All these stats follow the trend.

The average age of the top 20 on the men's tour is 27 years, 260 days — more than 2½ years older than it was 10 years ago, according to STATS Inc.

And on the women's tour over the last 10 years, the average age has spiked by almost exactly two years — to 26 years, 213 days.