Embodiments of a method and an apparatus for multi-link data transmission are disclosed. In an embodiment, a method of multi-link communications involves at a first MLD that supports a first link, link1, and a second link, link2, transmitting a first frame during a first Transmission Opportunity (TXOP) on link1, and a second frame during a second TXOP on link2, simultaneously to a second MLD, receiving, at the first MLD, a first response frame to the first frame transmitted on link1 after a transmission end time of the first frame, identifying, at the first MLD, that a response frame to the second frame transmitted on link2 was not received after the transmission end time of the second frame, and transmitting, at the first MLD, a third frame on link1 and a fourth frame on link2 simultaneously, after receiving the first response frame on link1.