  Strongly interacting electrons in solid-state systems often display tendency
towards multiple broken symmetries in the ground state. The complex interplay
between different order parameters can give rise to a rich phase diagram. Here,
we report on the identification of intertwined phases with broken rotational
symmetry in magic-angle twisted bilayer graphene (TBG). Using transverse
resistance measurements, we find a strongly anisotropic phase located in a
'wedge' above the underdoped region of the superconducting dome. Upon crossing
the superconducting dome, a reduction of the critical temperature is observed,
similar to the behavior of certain cuprate superconductors. Furthermore, the
superconducting state exhibits a anisotropic response to an
directional-dependent in-plane magnetic field, revealing a nematic pairing
state across the entire superconducting dome. These results indicate that
nematic fluctuations might play an important role in the low-temperature phases
of magic-angle TBG, and pave the way for using highly-tunable moir\'{e}
superlattices to investigate intertwined phases in quantum materials.
