Sri Lanka must be counting their lucky stars here. A target of 136 wasn't expected to challenge the Pakistani line up, especially in Abu Dhabi. Pakistan have lost a test match for the first time at this venue.
It was a extra ordinary performance by the Sri Lankan bowlers. Sri Lankan team were going through a bad phase; their morale was really low after losing the back to back matches against india and this win was much needed for them. Herath made the difference as the target was very easy to chase down, but he bowled brilliantly. Once again, it has been proved that Pakistani team is unpredictable and they lack the consistency.
Yes, being whitewashed in a home ODI series is something new for the Sri Lankan team. They have got their mojo back against Pakistan now. If West Indies had played a bit better against England, then Sri Lanka would have had to play the qualifiers to get into the World Cup. Thankfully, that didn't happen.