Onyekuru has scored 24 goals in the last campaign.
Janssen, 22, only started seven Premier League games for Spurs in the 2016/17 campaign.
Mbappe has scored 26 goals in the recently concluded campaign.
Van Dijk is recovering from an ankle injury sustained in January.
Real Madrid's record scorer scores twice to help defeat Juventus to claim another winners medal.
Zinedine Zidane unable to give Wales winger any guarantees over staying after Champions League triumph.
Ronaldo scores twice as Real thrash Juventus to become first side to defend the trophy since 1990.
Catalans linked with €90m move for Reds playmaker to replace Andres Iniesta.
Manchester United understood to be demanding £70m for the Spain international.
Mahrez has scored 11 goals and assisted 6 last season.
Griezmann has decided to stay in Atletico for another season.
Ozil and Sanchez are in the final year of their contracts.
Bale made just 19 appearances in the league for Real Madrid last season owing to injury.
Find out how to follow the showpiece event live on TV in the UK and abroad.
Real Madrid have been mentioned in connection with a potential world-record bid for dazzling playmaker.
The 19-year-old netted 26 goals while on loan at Bristol City in the 2016-17 campaign.
Dutch defender continues to be linked with move away from St Mary's.
The 27-year-old said of his United future: 'I want to keep improving to continue winning things.'
Basque side are expected to offer him a new deal to increase that clause.
Dutch side have also spoken to Bayern Munich and Man City about taking youngsters on loan.
Reports from Portugal suggest the Swedish defender is on verge of sealing £30m switch to Old Trafford.
Arsenal, Manchester United, Manchester City and Roma were also said to be interested in the midfielder.
Reports have suggested the Chelsea boss was keen to sign the Belgian this summer.
Lemar has scored 14 goals in all competitions this season.
Eagles chairman Steve Parish urges a realistic transfer approach as hopes over £30m centre-back fade.
Manchester City complete trio of Premier League clubs previously unsuccessful in moves for Italian stalwart.
IBTimes UK compare the cost of both squads ahead of the Cardiff final.
Atletico are not permitted to register any new players until 2018.
Former Middlesbrough boss overlooked by the Whites - but Claudio Ranieri remains in contention.
Real Madrid bidding to become first team in history to retain Champions League title.