Watford have rejected a £37.5m bid from Shanghai SIPG for striker Odion Ighalo, according to Sky sources.
SIPG coach Sven-Goran Eriksson is keen to partner the Nigeria international up front with Brazilian striker Hulk, who joined the big-spending Chinese club in a £46m deal on Thursday.
Ighalo, capped 11 times by his country, has scored 37 goals in 63 appearances since joining Watford from Spanish side Granada in May 2014.
Watford have completed the signing of Belgian centre-back Christian Kabasele from Genk in a £5.8m deal and Sky sources also understand Hornets boss Walter Mazzarri has broken the club's transfer record to bring in Ighalo's compatriot Isaac Success from Granada for £12.5m.
Belgian centre-back Christian Kabasele has also moved to Vicarage Road, with the club confirming his transfer from Genk.