Merkel is under pressure to get EU leaders at the main June 28-29 summit to agree to share out migrants more evenly to placate her conservative allies, Bavaria's Christian Social Union (CSU).
Italy wants more help from European Union countries in dealing with the arrival of migrants.
Tsipras said any agreement with Germany would not have significant knock-on effects on Greece as only between 50 to 100 asylum seekers a month are crossing the country's northern border, according to the report.
"As one member reserved their position on the entire conclusions, no conclusions have been agreed at this stage", the spokesman for European Council President Donald Tusk said in a statement.
Taxes sur les motos Américaines : Harley-Davidson va délocaliser
En 2017, Harley a vendu près de 40.000 nouveaux modèles en Europe, ce qui représente plus de 16% des ventes de la société. Pour le constructeur, il y a urgence à agir: l'Europe étant le deuxième marché de la marque, derrière les Etats-Unis.
Tusk and European Commission President Jean-Claude Juncker also cancelled a news conference scheduled for Thursday evening.
"I can not tell you that everything is settled", the French diplomat briefed reporters on the summit sidelines.
Express.co.uk has learned Italian Prime Minister Giuseppe Conte has blocked all of the summit conclusions - not just those on migration, which has not even been discussed by leaders of the EU28.
"It's a possibility I hope not to consider, but if we reach that point, on my behalf we will not have shared conclusions", he added.
PSG : Un énorme salaire record pour Marco Verratti au PSG !
Actuellement lié au PSG jusqu'en 2021, l'Italien pourrait voir son contrat s'allonger d'une saison, soit jusqu'en 2022. En ce sens, la Gazzetta dello Sport affirme aujourd'hui que Marco Verratti est proche d'une prolongation avec Paris.
Rome has recently refused to allow several migrant rescue boats dock at Italian ports, reviving fresh tensions despite the fact that numbers of arrivals have dipped sharply since the height of Europe's migration crisis in 2015.
"Europe has many challenges but migration could end up determining Europe's destiny", she told German lawmakers.
"That's why it's so important".
Sotomayor, in Dissent, Takes On Trump Travel Ban Tweets
Legal analysts say the order isn't very clear, and within hours, courts - including a federal judge in Boston - shoot it down. But their arrival was called off after Trump issued his ban and there has been little movement in their case.