Webo, 25, is regarded as a player who brings others into the game and makes chances rather than scoring prolifically himself. He managed only 20 goals in the last four campaigns despite playing in over 100 matches.
However he became a national hero after bagging a sensational hat-trick in the 2006 World Cup qualifying 3-2 win in Ivory Coast. It proved to no avail as the latter progressed to the finals in Germany at Cameroon's expense.
Osasuna finished last season in a disappointing 14th after taking fourth place in the one prior, pipping UEFA Cup holders Sevilla. They missed out on a place in the Champions League though after losing in the qualifying round.
Drenthe keen to make Madrid move
Ironically Sevilla then knocked them out of the UEFA Cup semi-finals as they went on to retain the trophy.