Rumors emerged yesterday that Kim Kardashian and NFL star Mark Sanchez were secretly seeing each other while he was said to be dating Victoria’s Secret model Kate Upton.

Kim Kardashian, 31, had quickly denied that she is dating Mark Sanchez.

She took to her Twitter account to set the record straight.

In fact Kim Kardashian said that she doesn’t even know the sportsman.

She wrote: “Dating rumors are always fun when u don’t even know the people your supposedly linked to! Who makes this stuff up!”

Rumors that Kim Kardashian was moving on following the breakdown of her 72-day marriage to basketball player husband Kris Humphries by dating the New York Jets player emerged yesterday.

Kim Kardashian had quickly denied that she is dating Mark Sanchez; in fact she said that she doesn't even know the sportsman

They came after Mark Sanchez was said to dating Victoria’s Secret Model Kate Upton, 19.

Website Strawberryicecream.com reported that the fact that Mark Sanchez was involved with somebody else didn’t stop him from indulging in secret meetings with Kim Kardashian in New York.

The website claimed a source said: “They are very careful with not being seen together, Mark is seeing someone!”

The source added: “Kim and Mark like to meet in hotels for dinner dates and <<flings>>. Whenever Kim is in New York, they hang out.”

The website also claims that Kim Kardashian and Mark Sanchez were planning a rendezvous for the Super Bowl weekend.

A representative for Kim Kardashian also denied allegations that the reality star is dating the quarterback.

The reports are unlikely to be well-received by Kate Upton, who has been linked to the sports star since December.

According to the New York Post, Mark Sanchez has frequently been spotted arriving at Kate Upton’s home late at night.

A source told the New York Post in December: “They never come in together. He’s always five steps after her.”

The quarterback has dated a string of beauties, including Jamie-Lynn Sigler and Hilary Rhoda, since he rose to fame when joining the New York Jets.

According to the New York Post, Mark Sanchez has frequently been spotted arriving at Kate Upton's home late at night

In the summer of 2011 Mark Sanchez was linked to Heroes star Hayden Panettiere, although the blonde denied they were romantically involved at the time.

Hayden Panettiere told Us Weekly: “I swear I’m not dating him at all. Honestly. I’m a huge Jets fan and became very good friends with him and his buddies.

“There’s genuinely, absolutely nothing going on. I’ve always been that girl who has a lot of dude friends. I’m into sports so we have a lot in common, but no, definitely 100% not dating.”

Kim Kardashian found herself in hot water earlier this month after Amber Rose claimed the reality star was the reason behind her split from Kanye West.

The model claimed that Kim Kardashian, who was dating Reggie Bush at the time, began an affair that led her and Kanye West to break up.

Amber Rose said: “She’s a homewrecker! They were both cheating. They were both cheating on me and Reggie with each other.”

And she said that Kim Kardashian instigated the affair by sending sexy pictures of herself to him as well as calling and texting him.

Amber Rose added: “She was sending pictures, and I was like, <<Kim, just stop. Don’t be that person>>.”

Amber Rose said she also emailed Kim Kardashian asking her for an explanation but was disappointed not to get a reply.

The model said: “I thought at least she’d be woman enough to respond to me. She never responded.

“It’s very important that us women stick together and we don’t f*** each other over like that.”