They have already drawn the Test series 1-1.
But that is not to say that there has been no progress.
In hindsight, it did go downhill from there.
The skipper soon followed after he was cleaned up by Taskin Ahmed - on a high after taking a hat-trick in the second ODI - but Mendis batted with great maturity once again to keep Sri Lanka ticking along.
Mendis was left frustrated after his maiden ODI hundred in the second game came without reward due to rain leading to the abandonment of the match in Dambulla on Tuesday.
In reply, Bangladesh was bowled out for 210 in 44.3 overs.
Mashrafe disclosed the matter while addressing a press conference after the third ODI match at the Sinhalese Sinhalese Club Club.
Needing a win to avoid a series defeat for the first time against Bangladesh, Gunathilaka and Tharanga began aggressively to put on 76 runs in their opening stand in a little over 10 overs.
Nuwan Kulasekara struck twice with the new ball to effectively end Bangladesh's hopes, reducing them to 11 for three, before Soumya Sarkar (38) and Shakib Al Hasan (54) added some respectability to the score. "They have to play well, and we have to play our best game to come good", said Bangladesh coach Chandika Hathurusinghe. Apart from the first match, Bangladesh were not able to thrive when things were not going their way; and so Sri Lanka quite fairly have the lion's share of the stalemate. The two teams have played 4 matches at this venue against each other, with Sri Lanka winning on all 4 occasions.