Ui-jo Hwang was on the scoresheet for South Korea on Friday, while Shane Duffy and Adam Idah lost out to Dimitris Giannoulis' Greece.
Loanee striker Hwang completed the scoring in a 4-0 rout of Tunisia in an international friendly.
Hwang, a late substitute, produced a composed finish in the 91st minute, sliding the ball past the onrushing Tunisian 'keeper with his right foot.
In Dublin, the Republic of Ireland's Euro 2024 qualification hopes were thwarted by a two-nil defeat to Greece, who move into second place in qualification group B.
Shane Duffy started in defence for the boys in green, while Adam Idah was introduced late-on in an attempt to turn the result around. Dimitris Giannoulis was an unused sub for Greece.
Elsewhere, Tony Springett claimed an assist for the Republic of Ireland Under-21s' second goal in a 2-1 away win over Latvia in their Euro qualifier.