Meaning of the word "when Greek meets Greek, then comes the tug of war" in English

What does "when Greek meets Greek, then comes the tug of war" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

when Greek meets Greek, then comes the tug of war

US /wen ɡriːk miːts ɡriːk, ðen kʌmz ðə tʌɡ əv wɔːr/
UK /wen ɡriːk miːts ɡriːk, ðen kʌmz ðə tʌɡ əv wɔː/
"when Greek meets Greek, then comes the tug of war" picture

Idiom

when two people of equally strong character, determination, or ability encounter each other, a fierce or prolonged struggle ensues

Example:
The negotiations were intense; when Greek meets Greek, then comes the tug of war.
Both lawyers were incredibly stubborn, so when Greek meets Greek, then comes the tug of war.