  We aim at the discovery of new planetary systems by exploiting the transit
light curve results from TESS orbital observatory's Sector 1 and 2 observations
and validating them with precise Doppler measurements obtained from archival
HARPS data. Taking advantage of the reported TESS transit events around GJ143
(TOI 186) and HD23472 (TOI 174) we model their HARPS precise Doppler
measurements and derive orbital parameters for these two systems. For the GJ143
system TESS has reported only a single transit, and thus its period is
unconstrained from photometry. Our RV analysis of GJ143 reveal the full
Keplerian solution of the system, which is consistent with an eccentric planet
with a mass almost twice that of Neptune and a period of $P_{\rm b}$ =
$35.59_{-0.01}^{+0.01}$ days. Our estimates of the GJ143 b planet are fully
consistent with the transit timing from TESS. We confirm the two-planet system
around HD23472, which according to our analysis is composed of two Neptune mass
planets in a possible 5:3 MMR.
