head-to-head

adjectives

involving two persons; intimately private
"a tete-a-tete supper"; "a head-to-head conversation"
head-to-head, tete-a-tete
inconclusive as to outcome; close or just even in a race or comparison or competition
"as they approached the finish line they were neck and neck"; "the election was a nip and tuck affair"
head-to-head, neck and neck, nip and tuck

adverbs

even or close in a race or competition or comparison
"the horses ran neck and neck"; "he won nip and tuck"
head-to-head, neck and neck, nip and tuck