Tampines chairman Krishna Ramachandra says they are ready to release the Singapore international.
The White Swans are now five-points clear of second-placed Home United
Mumbai defeated Pune by one run in a low-scoring thriller on the final night of IPL 10.
India begin Sudirman Cup campaign against second seeds Denmark in Gold Coast on Monday.
With Champions League berth in sight, the Sky Blues travel to Watford on the final match day of the season.
Jurgen Klopp's men are a win away from Champions League berth.
Fifth-placed Arsenal take on Everton in their last match of the league season at home on Sunday.
Second seed Djokovic takes on 16th seed Alexander Zverev in the title match of Italian Open on Sunday.
Tampines take on league leaders Albirex at the Jurong West Stadium on Sunday.
Two-time champion Mumbai take on Pune in the final of the 10th edition of the league in Hyderabad on Sunday.
Top seeds China take on ninth seeds Hong Kong in the tournament opener on Sunday.
Raab tells IBTimes Singapore that Tampines are well prepared for S.League clash.
16th seed Zverev takes on American player Isner in the first Men's singles semi-final on Saturday.
The Eagles host in-form Philippe Aw's side on Saturday at the Jalan Besar Stadium.
Sudirman Cup, the biennial mixed team badminton championships will be played in Gold Coast, Australia from 21 May.