Laslo Đere mainly plays on the ATP Challenger Tour and the ITF Future Tour . So far, he has celebrated five individual victories on the Future Tour. He won his first title on the ATP Challenger Tour in Perugia by beating Daniel Muñoz de La Nava in the final .
He made his singles debut on the ATP World Tour in September 2013 at the Thailand Open in Bangkok, where he received a wildcard for the main field, but there he clearly failed in two sets in the first main round by Feliciano López . He made his first appearance on the world tour level with Wishaya Trongcharoenchaikul , with whom he formed a pair, also at the Thailand Open in Bangkok in September 2013. There they lost their first round game against Christopher Kas and Oliver Marach 4-6 and 3: 6.
In February 2019 he achieved his greatest success to date. In Rio de Janeiro he defeated Félix Auger-Aliassime in the final and won his first ATP Tour title without losing a set. Through this success he reached a new career record with 37th place.