ROGER FEDERER believes Novak Djokovic is not invincible and that he is still sprightly enough too prove it.
Swiss legend Fed, 38, is the oldest man to reach a Slam semi-final since 39-year-old Jimmy Connors at the 1991 US Open.
Many will expect Aussie Open holder Djokovic, 32, to smash old man Federer in their 50th clash today.
Yet despite his age and tough Melbourne run, the 20-time Grand Slam champ takes confidence from beating Djok at the ATP Finals two months ago.
Federer, a six-time Oz winner but beaten by Djok in last years Wimbledon final, said: That win helps me and does me good.
Its clear because it showed me he is beatable.
Obviously I have to do several things well. But I hope it is the same thing for players against me.
‘NEVER GIVES UP’
It always does me good to know that, at my age, from time to time I can beat Rafa Nadal and Novak and win tournaments.
Federer was stretched physically against John Millman then survived SEVEN match points against Tennys Sandgren.
The world No3 was fined 2,300 for swearing in that quarter-final escape.
He also had groin and leg issues, and decided to rest yesterday.
Djokovic, in comparison, has dropped just one set out of 16, spent 147 minutes less on court and had his service game broken just five times.
The Serb said: What Roger did in the quarter-finals was amazing. He never gives up.
JAMIE MURRAY wants more prize money for mixed doubles stars.
Murray and Bethanie Mattek-Sands are in the semis and will get 49,000 each if they win the tournament just 2,000 more than first-round singles losers.
The Scot, 33, said: If they want more top players to play, they need to really up the prize money.
