play second fiddle
US /pleɪ ˈsɛkənd ˈfɪdl/
UK /pleɪ ˈsɛkənd ˈfɪdl/
1.
to be in a subordinate or less important position than someone else
:
•
She's tired of always having to play second fiddle to her older sister.
•
He's a talented musician, but he always seems to play second fiddle in the band.