Actress Eva Mendes is reportedly having one-sided rivalry for roles with Jessica Chastain.

Radaronline.com reports that a source close to the situation said that the two actresses share the same agent, and `Eva has informed her that any role Jessica goes up for, she wants to audition for as well."

Mendes, 40, `feels an intense one-sided rivalry that stems from when she lost out to Jessica for the role of Maya in 'Zero Dark Thirty'.

`Eva desperately wanted to be considered for the part as she's tired of being typecast as a love interest and wants to be a leading lady,` added the source.

Their agent is caught in the middle and is trying hard to keep them apart and on different career tracks.

`But Eva's declaration that she wants to audition for the same roles has made things all the more complicated.

`They are obviously two completely different types. Jessica's pretty much in the dark about it but it's only a matter of time before she hears that Eva's reading for the same parts,` the source said.