Mexico's state-run oil company — Petroleos Mexicanos (Pemex) — still owes Tidewater money.

The amount owed to the Houston offshore vessel giant ballooned to $26m by the end of 2020, finance chief Samuel Rubio said on Tidewater's first-quarter earnings call on Friday.

Tidewater had previously said Pemex owed it $18m.

Rubio, who called the oil company a "good customer", said: "Their payment patterns have improved in 2021.