Manchester United manager Alex Ferguson has challenged his three main strickers to each reach 20 goals this season as the Old Trafford club aim for a trophy treble.
.
United move seven points clear at the top of the Premier League table with a 2-1 win at home to Southampton on Wednesday.
.
They have an FA Cup fifth round tie to come against Reading and also face Real Madrid in the UEFA Champions League last 16 next month.
.
Rooney scored twice against the Saints to take his tally for the season to 12 goals, while Robin van Persie has scored 22 in all competitions and Javier Hernandez has managed 14.
.
'' Wayne scored in the 4-1 win over Fulham on Saturday too if Chicharito, Wayne and Robin give us over 20 goals each we're in business '', Ferguson said.