Anthony Ujah will return to Mainz at the end of the season when his loan deal with 2 Bundesliga club Cologne expires, according to German newspaper <i>Bild.</i><br /><br />The 22 - year - old Nigerian forward has netted 9 goals in 21 matches including his brace against Paderborn this past weekend.<br /><br />''Basically no information on the contract details. We and Cologne have a very fair and performance-based compensation agreement,'' manager Christian Heidel told Bild.<br /><br />If Ujah scores 10 goals for Cologne in Germany's second tier, Mainz would be entitled to 150,000 euros compensation.<br /><br />The ex Lillestrom star is under contract with Mainz until the summer of 2015.<br />