Marquez jumped from fourth on the grid to secure his second sprint win of the season, beating Martin by over 1.5s on his year-old Ducati.
The Spaniard fought hard with early race leader Francesco Bagnaia, as well as Martin, on his way to the front of the pack and proved no match for either with his speed.
Martin felt he could have won the sprint, but admits Marquez’s pace was too good for him and he’s not sure how.
“Was complicated, because I saw he [Bagnaia] had half a second [gap],” he said about racing Marquez.
“So, it was too much to recover again because I already recovered a little bit, but then losing again so quick.
“But Alex was unbelievably fast today, I couldn’t even follow him. When they [Alex and Pecco] fight, I arrived to Pecco and I tried the move and it went well.
“And afterwards I tried to recover to Alex but he was too fast.
“The important thing was we were faster than Pecco.
“We need to understand what Alex has on his bike because with the same bike and making such a difference, it’s difficult to believe. But he’s riding so good.”