John Cena. Picture: Instagram (@thenikkibella)

John Cena has admitted life is "not easy" in a defiant message giving advice to his fans.

The WWE superstar - who split from his fiancee Nikki Bella this year just weeks before they were due to get married - has shared a cryptic post on social media as he urged anyone who needed it to "ask for help" and make use of the friends around you.

He tweeted: "Life has points where it's not easy. Many times it feels like you against the world, but you never have to go it alone.

"Ask for help, work hard, get a good group around you and the tough times will pass."

The 41-year-old star has been sharing a number of thought-provoking tweets recently, and over the weekend he posted a quote from influential late Russian playwright Anton Chekhov.

Explaining he's "always enjoyed" the line, he shared: "Perhaps the feelings that we experience when we are in love represent a normal state. Being in love shows a person who he should be."

Meanwhile, the 41-year-old star - who will be performing at WWE's 'Super Show-Down' on Saturday (06.10.18) in Australia - has revealed he'll be returning to China for another "two months" after the event.

He said: "Travel in the WWE is amazingly relentless but it's only because we have an audience that's so spread out. When you come to perform in Shanghai, you leave the next day because the routing is so very difficult it's logistically impossible to keep you there because there's another show to be had.

"This is similar to everywhere across the world. I've often told people, 'I've been around the world 25 times and seen nothing.'

"So, being able to come here and make this my home, like, I'm here. I've been here for three months and I'll be here for two more. So, five months out of a calendar year, I'm here."