The Battle of Guruslău or Battle of Goroszló (Hungarian: goroszlói csata) was fought on 3 August 1601, between the troops of the Habsburg monarchy led by Giorgio Basta, the Cossacks and Wallachia led by Michael the Brave on one side, and the Transylvanian troops led by Sigismund Báthory on the other side.

It was part of a series of military encounters between the Ottoman Empire and opposing European states during 1591–1606 (see also The Long War).

Michael asked for assistance from Emperor Rudolf II during a visit in Prague between 23 February and 5 March 1601.

The visit was granted when the emperor heard that General Giorgio Basta had lost control of Transylvania to the Transylvanian Hungarian nobility led by Sigismund Báthory, who accepted Ottoman protection.

Meanwhile, Wallachian forces loyal to Michael and led by his son, Nicolae Pătrașcu, drove out Simion Movilă from Moldavia and prepared to re-enter Transylvania.