A second game in a row on the road in the Championship ended in defeat at the hands of a 43rd minute Lewis Grabban goal as Latics ended the game with ten men when second half substitute Callum McManaman was sent off four minutes after coming on.
AFC Bournemouth's tough performance and new found solidity at the back after the 6-1 thumping they received from Watford last week proved a step too far for Latics as Owen Coyle's men couldn't find a crucial equaliser.
The manager made one change from last weekend's Community Shield game as Jean Beausejour returned to the starting line-up as James McClean dropped the the bench.
A tight first half saw Latics and Bournemouth create half chances but neither could find the crucial gaps in each other's defences as mistake seemed to be the only way in.
James McCarthy tested Ryan Allsop from range after just seven minutes but Bournemouth's defence were limiting Latics only to chances from set pieces.
It took until the 43rd minute for the deadlock to be broken when a back pass from James Perch wasn't hard enough, giving Bournemouth forward Grabban and Latics goalkeeper Scott Carson a foot rtace to contend for.
Carson set off but hesitated as Grabban beat him to it, rounding Latics' number one and slotting home for 1-0 with two minutes of the half remaining.
The second half was much livelier and eight minutes into it a high but unfortunate challenge by Jean Beausejour on Brett Pitman forced referee Graham Scott to point to the penalty spot.
Up stepped the downed man Pitman but some improvised distracting from Carson on the line put the striker off as he struck to the goalkeeper's left but saw his shot beaten away, penalty saved!
On the 55th minute Latics made a double change with McManaman and James McClean introduced with the former only lasting until the 59th.
It was a heavy tackle on Pitman that saw McManaman given his marching orders despite seemingly making clear contact with the ball with his trailing leg taking the Bournemouth man off his feet.
With ten men it became a desperate attempt for an equaliser and Latics almost got it on the 69th minute when a Shaun Maloney corner was thumped towards goal off Leon Barnett's head but cleared off the line by Marc Pugh.
The game then became a battle for one goal, one to seal it for the hosts and one to draw level for Latics, unfortunately for the visitors it didn't come as Bournemouth held on through six minutes of injury time to hold on for the full three points.