Serbian Dušan Lajović defeats Australian 3-6, 6-1, 6-4 Defending champion criticises soft 'lemon' balls after loss Local hero and defending champion Thanasi Kokkinakis has crashed out of his home town Adelaide International after suffering a first-round loss to Serbian Dušan Lajović. Lajović overcame an indifferent start to elevate his play as the night wore on and leave the Memorial Drive crowd disappointed after winning 3-6, 6-1, 6-4.