Manchester United have made a third bid for Brentford forward Bryan Mbeumo that could be worth up to £70m.
The offer is understood to be an initial £65m, with £5m in add-ons.
Brentford are yet to discuss the offer.
United have remained confident about getting Mbeumo and have been hopeful of adding the Cameroon international to Ruben Amorim's squad before they head to the US for three pre-season games on Tuesday.
Although they have been strongly linked with Chelsea forward Nicolas Jackson and Aston Villa goalkeeper Emiliano Martinez in recent days, it has always been the priority at Old Trafford to get the Mbeumo deal done in time for Amorim to work with him in Chicago, where United will largely be based for their 13-day trip.
The 25-year-old scored 20 Premier League goals last season and a number of clubs were interested in him, including Tottenham, now managed by former Brentford boss Thomas Frank.
However, Mbeumo's preference was to join United.
Brentford's other main goal threat, striker Yoane Wissa, is the subject of interest from Newcastle.
Last season, Amorim repeatedly spoke about United's failure to convert their chances.
Their 44 Premier League goals was United's worst return in a domestic campaign since they were relegated in 1973-74.
United have signed forward Matheus Cunha and defender Diego Leon in the summer transfer window.
BBC