Just last month, Cristiano Ronaldo boldly claimed he's the greatest player in football history and that no one is as complete as he is.

His comments came after equaling Lionel Messi's haul of five Ballon d'Ors. He said in December: "I'm the best player in history, in the good moments and the bad ones.

"I respect everyone's preferences, but I've never seen anyone better than me. I have always thought that. No footballer can do the things I can. There's no player more complete than me.

"I play well with both feet, I'm quick, powerful, good with the head, I score goals, I make assists. There are guys who prefer Neymar or Messi.

"But I tell you: there's no-one more complete than me. No one has won as many individual trophies as me - and I'm not speaking just of the Ballon d'Or."

Safe to say not everyone agreed with the Real Madrid man at the time about being better than the likes of Messi, Diego Maradona and Pele.

And worse still for Ronaldo is that his goalscoring form this season doesn't exactly back up his claim of being the best ever.

In 14 La Liga appearances the Portuguese has scored just four goals, meaning he's 12 behind the league's top goalscorer, Messi (16).

His wretched form in front of goal continued during Saturday's 1-0 defeat at home to Villarreal, where he had no less than 11 attempts at goal and only found the target four times.

Furthermore, Ronaldo failed to complete a single take-on.

With every passing week more and more football fans are starting to believe he's finished and based on his highlights from the Villarreal game, it might actually be true.

Ronaldo is nowhere near as lethal in front of goal as he used to be, nor is he as fast, and his steep decline is actually quite sad to see. Check out his highlights and judge for yourself.

CRISTIANO RONALDO VS VILLARREAL

What's happened to him? It's only natural for players of Ronaldo's age to start declining, but not at the speed he has over the past 12 months.

The Portuguese has gone from a goalscoring machine who bagged 25 league goals last season to someone with a conversion rate of just 4.3%.

With his 33rd birthday just around the corner, time is running out for Ronaldo to prove to the world he hasn't lost it just yet.