$t\bar{t}X$ results from ATLAS and CMS

The associated production of top-quark pairs with $W$ bosons or heavy-flavour jets are rare Standard Model phenomena compared to the inclusive top-quark pair production. Both processes are important background sources for Standard Model measurements like e.g. $t\bar{t}H$ production in the multilepton and $b\bar{b}$ Higgs decay channels or $t\bar{t}t\bar{t}$ production, and thus a precise knowledge of their properties is crucial. Additionally, these production channels can be significant background sources in searches for new physics. The current status of $t\bar{t}W$ and $t\bar{t}+\mathrm{HF}$ measurements performed by the ATLAS and CMS Collaborations is summarised in this article. The measurements are based on data collected from proton-proton collisions with a centre-of-mass energy of $13\,\mathrm{TeV}$ at the Large Hadron Collider at CERN.