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A combination of lattice and continuum data for the light-quark V-Acorrelator, supplemented by results from a chiral sum-rule analysis of theflavor-breaking flavor $ud$-$us$ V-A correlator difference, is shown to makepossible a high-precision NNLO determination of the renormalized NLO chirallow-energy constant $L_{10}^r$. Key to this determination is the ability tosimultaneously fix the two combinations of NNLO low-energy constants alsoentering the analysis. With current versions of the strange hadronic $\tau$branching fractions required as input to the flavor-breaking V-A sum rule, wefind $L_{10}^r(m_\rho ) = -0.00346(29)$. This represents both the best currentprecision for $L_{10}^r$, and the first NNLO determination having all errorsunder full control.

$L_{10}^r$ From a Combined NNLO Lattice, Continuum Analysis of the Light Quark V-A Correlator