SEOUL, May 19 (Reuters) - Samsung Electronics and Alibaba Group Holding plan to announce a collaboration on mobile payment systems on Friday, South Korean media reported.

Under the tie-up, Samsung Electronics plans to allow its smartphone customers to use Alipay, the online payment platform run by a unit of Chinese e-commerce giant Alibaba, media reports said on Thursday.

A Samsung Electronics spokeswoman declined to comment.

(Reporting by Hyunjoo Jin; Editing by Richard Pullin)