According to sources, basketball player Lamar, 35, confronted 31-year-old Khloe as she headed to the gym, over her alleged relationship with James Harden.
“Lamar has been trying to contact Khloe, but she is done and has ignored him. Lamar has issues with Khloe dating [James] Haden,” an insider told People.
The source claimed that Khloe is now considering hiring security, as the incident with Lamar left her so shook up.
“It made Khloe first shocked and then scared that Lamar was waiting outside the studio,” the insider added.
“She doesn’t know how he found her. She is thinking about getting a bodyguard.”
But Lamar has blasted the claims. Despite being photographed with Khloe outside SoulCycle in Beverly Hills on Wednesday, he insists their encounter was innocent.
Speaking to TMZ, Lamar said: “Nobody got hassled, nobody got grabbed on, nobody got followed, none of that happened.
“It’s ridiculous, it’s crazy, I don’t know what kind of move that is but it’s not the truth.”
Lamar then suggested that the meeting had been arranged, adding: “Did I just guess right, where this girl may be? You know I know Khloe. How would you think I ended up there?”
While Khloe has yet to confirm her relationship with Houston Rockets player James, she was snapped kissing him during younger sister Kylie Jenner’s recent 18th birthday celebrations.
Khloe filed for divorce from Lamar in 2013, but the papers were only singed in June this year.