As cami j said the ATP does not have tiers. Their format is the best nine tournaments are the ATP Masters Series, followed by the nine ATP International Series Gold tourneys and lastly you have the 43 ATP International Series tournaments. For men the Estoril Open is an International Series event.
The males dont have tiers when they play tournaments only the women do but its considered a great tournament for future slam contenders.
i agree with cami j..
in men’s side….it;s only considered as ATP tour…
for the women’s side… it is tier 4 event….
As cami j said the ATP does not have tiers. Their format is the best nine tournaments are the ATP Masters Series, followed by the nine ATP International Series Gold tourneys and lastly you have the 43 ATP International Series tournaments. For men the Estoril Open is an International Series event.